import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Iterator;


public class Main_yukicoder309 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Printer pr = new Printer(System.out);

        int r = sc.nextInt();
        int c = sc.nextInt();
        int[][] p = new int[r][c];
        int[][] s = new int[r][c];
        for (int i = 0; i < r; i++) {
        	for (int j = 0; j < c; j++) {
        		String tmp;
        		for (tmp = sc.next(); tmp.equals(""); tmp = sc.next()) {
        		}
    			p[i][j] = Integer.parseInt(tmp);
        	}
        }
        for (int i = 0; i < r; i++) {
        	for (int j = 0; j < c; j++) {
        		String tmp;
        		for (tmp = sc.next(); tmp.equals(""); tmp = sc.next()) {
        		}
        		s[i][j] = Integer.parseInt(tmp);
        	}
        }

        int n = 0x1 << c;

        double[][] dp = new double[r + 1][n];
        double dtmp = 1;
        for (int i = 0; i < c; i++) {
        	dtmp /= 2;
        }
        Arrays.fill(dp[0], dtmp);
//        for (int i = 1; i <= r; i++) {
//        	Arrays.fill(dp[i], 1.0);
//        }

        for (int i = 1; i <= r; i++) {
        	for (int j = 0; j < n; j++) {
        		for (int k = 0; k < n; k++) {
        			if (dp[i - 1][k] == 0) {
        				continue;
        			}

            		double ptmp2 = 1.0;
        			for (int l = 0; l < c && ptmp2 != 0; l++) {
        				int po = 0;
        				if (i != 1 && (k & 0x1 << l) != 0) {
        					po += 1;
        				}
        				if (l - 1 >= 0 && (j & 0x1 << l - 1) != 0) {
        					po += 1;
        				}
        				if (l + 1 < c && (j & 0x1 << l + 1) != 0) {
        					po += 1;
        				}

        				double ptmp = 0;
        				if (po + 4 - s[i - 1][l] >= 4) {
        					ptmp = (double)p[i - 1][l] / 100;
        				}

        				if ((j & 0x1 << l) != 0) {
        					ptmp2 *= ptmp;
        				} else {
        					ptmp2 *= (1.0 - ptmp);
        				}
        			}
            		dp[i][j] += ptmp2 * dp[i - 1][k];
        		}
        	}
        }

        double ret = 0;
        for (int i = 1; i <= r; i++) {
        	for (int j = 0; j < n; j++) {
        		ret += dp[i][j] * Integer.bitCount(j);
        	}
        }

        pr.printf("%.14f\n", ret);

        pr.close();
        sc.close();
    }

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;
		Iterator<String> it;

		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}

		String next() throws RuntimeException  {
			try {
				if (it == null || !it.hasNext()) {
					it = Arrays.asList(br.readLine().split(" ")).iterator();
				}
				return it.next();
			} catch (IOException e) {
				throw new IllegalStateException();
			}
		}

		int nextInt() throws RuntimeException {
			return Integer.parseInt(next());
		}

		long nextLong() throws RuntimeException {
			return Long.parseLong(next());
		}

		float nextFloat() throws RuntimeException {
			return Float.parseFloat(next());
		}

		double nextDouble() throws RuntimeException {
			return Double.parseDouble(next());
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new IllegalStateException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}