#[allow(unused_imports)]
use std::cmp::*;
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
    ($($r:tt)*) => {
        let stdin = std::io::stdin();
        let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
        let mut next = move || -> String{
            bytes.by_ref().map(|r|r.unwrap() as char)
                .skip_while(|c|c.is_whitespace())
                .take_while(|c|!c.is_whitespace())
                .collect()
        };
        input_inner!{next, $($r)*}
    };
}

macro_rules! input_inner {
    ($next:expr) => {};
    ($next:expr,) => {};
    ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };
}

macro_rules! read_value {
    ($next:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
    };
    ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}

trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); }
impl<T: PartialOrd> Change for T {
    fn chmax(&mut self, x: T) { if *self < x { *self = x; } }
    fn chmin(&mut self, x: T) { if *self > x { *self = x; } }
}

fn find(rem: &[i32]) -> usize {
    let c = rem.len();
    let mut vis = 0;
    let mut que = vec![];
    for i in 0..c {
        if rem[i] <= 0 {
            que.push(i);
        }
    }
    while let Some(v) = que.pop() {
        if (vis & 1 << v) != 0 {
            continue;
        }
        let adj = ((vis << 1) & (5 << v)) >> v;
        let x = match adj {
            0 => 0,
            1 | 4 => 1,
            5 => 2,
            _ => panic!(),
        };
        if rem[v] <= x {
            vis |= 1 << v;
            if v + 1 < c {
                que.push(v + 1);
            }
            if v > 0 {
                que.push(v - 1);
            }
        }
    }
    vis
}

fn main() {
    // In order to avoid potential stack overflow, spawn a new thread.
    let stack_size = 104_857_600; // 100 MB
    let thd = std::thread::Builder::new().stack_size(stack_size);
    thd.spawn(|| solve()).unwrap().join().unwrap();
}

fn solve() {
    input! {
        r: usize, c: usize,
        p: [[f64; c]; r],
        s: [[i32; c]; r],
    }
    let mut dp = vec![0.0; 1 << c];
    let mut dpx = vec![0.0; 1 << c];
    dp[0] = 1.0;
    for i in 0..r {
        let mut ep = vec![0.0; 1 << c];
        let mut epx = vec![0.0; 1 << c];
        for bits in 0..1 << c {
            let mut rem = vec![4; c];
            let mut pr = 1.0;
            for j in 0..c {
                if (bits & 1 << j) != 0 {
                    rem[j] = s[i][j];
                    pr *= p[i][j] / 100.0;
                } else {
                    pr *= 1.0 - p[i][j] / 100.0;
                }
            }
            for pre in 0..1 << c {
                let mut rem = rem.clone();
                for j in 0..c {
                    if (pre & 1 << j) != 0 {
                        rem[j] -= 1;
                    }
                }
                let to = find(&rem);
                ep[to] += dp[pre] * pr;
                epx[to] += dpx[pre] * pr + dp[pre] * pr * to.count_ones() as f64;
            }
        }
        dp = ep;
        dpx = epx;
    }
    let s: f64 = dpx.iter().sum();
    println!("{}", s);
}