using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using System.Diagnostics;
using System.Numerics;
using Enu = System.Linq.Enumerable;

class Program
{
    static readonly int Threshold = 4;

    public void Solve()
    {
        //var sw = Stopwatch.StartNew();
        int H = Reader.Int(), W = Reader.Int();
        Reader.Line();
        var Prob = Reader.IntTable(H).Select(r => r.Select(c => c / 100.0).ToArray()).ToArray();
        Reader.Line();
        var Val = Reader.IntTable(H).Select(r => r.Select(c => Threshold - c).ToArray()).ToArray();
        int[] atLast = Simulate(W);
        var dp = new double[1 << W];
        dp[0] = 1;
        double ans = 0;


        for (int r = 0; r < H; r++)
        {
            var nextdp = new double[1 << W];
            for (int currMask = 0; currMask < (1 << W); currMask++)
            {
                double currMaskProb = 1;
                for (int c = 0; c < W; c++)
                    if ((currMask >> c & 1) == 1) currMaskProb *= Prob[r][c];
                    else currMaskProb *= 1 - Prob[r][c];

                for (int prevMask = 0; prevMask < (1 << W); prevMask++)
                    if (dp[prevMask] > 0)
                    {
                        double p = dp[prevMask] * currMaskProb;
                        int key = 0;
                        for (int c = 0; c < W; c++)
                        {
                            int pt = Val[r][c] * (currMask >> c & 1);
                            if (r > 0) pt += prevMask >> c & 1;
                            key = (key << 2) + Math.Max(0, Math.Min(Threshold, pt) - 1);
                        }
                        int nextMask = atLast[key];
                        ans += p * BitCount32(nextMask);
                        nextdp[nextMask] += p;
                    }
            }
            dp = nextdp;
        }

        Console.WriteLine(ans);
        //Console.WriteLine(sw.ElapsedMilliseconds);
        //Console.ReadLine();
    }

    private int[] Simulate(int W)
    {
        int pow = 1 << W * 2;
        int[] res = new int[pow];
        int[] pt = new int[W];

        for (int mask = 0; mask < pow; mask++)
        {
            var who = new List<int>();
            Action<int, List<int>> Add = (w, list) => { res[mask] += 1 << w; list.Add(w); };

            for (int c = W - 1, tmp = mask; c >= 0; c--, tmp >>= 2)
            {
                pt[c] = 1 + (tmp & 3);
                if (pt[c] == Threshold) Add(c, who);
            }
            while (who.Count > 0)
            {
                var nextWho = new List<int>();
                foreach (int c in who)
                {
                    if (c - 1 >= 0 && ++pt[c - 1] == Threshold) Add(c - 1, nextWho);
                    if (c + 1 < W && ++pt[c + 1] == Threshold) Add(c + 1, nextWho);
                }
                who = nextWho;
            }
        }

        return res;
    }

    static int BitCount32(int x)
    {
        x -= x >> 1 & 0x55555555;
        x = (x & 0x33333333) + (x >> 2 & 0x33333333);
        return ((x + (x >> 4) & 0x0f0f0f0f) * 0x01010101) >> 24;
    }

}


class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
    private static TextReader reader = Console.In;
    private static readonly char[] separator = { ' ' };
    private static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
    private static string[] A = new string[0];
    private static int i;
    private static void Init() { A = new string[0]; }
    public static void Set(TextReader r) { reader = r; Init(); }
    public static void Set(string file) { reader = new StreamReader(file); Init(); }
    public static bool HasNext() { return CheckNext(); }
    public static string String() { return Next(); }
    public static int Int() { return int.Parse(Next()); }
    public static long Long() { return long.Parse(Next()); }
    public static double Double() { return double.Parse(Next()); }
    public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }
    public static int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
    public static int[][] IntTable(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
    public static string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Next()).ToArray(); }
    public static string Line() { return reader.ReadLine().Trim(); }
    private static string[] Split(string s) { return s.Split(separator, op); }
    private static string Next() { CheckNext(); return A[i++]; }
    private static bool CheckNext()
    {
        if (i < A.Length) return true;
        string line = reader.ReadLine();
        if (line == null) return false;
        if (line == "") return CheckNext();
        A = Split(line);
        i = 0;
        return true;
    }
}