#include <cstdio>

using namespace std;

#define Real double
#define EPS (Real)(1e-12)
#define MAX_H 11
#define MAX_W 11

int h,w;
Real p[MAX_H][MAX_W];
int s[MAX_H][MAX_W];
Real result;
Real raised[MAX_H+1][1<<MAX_W];
bool know[MAX_W];
int raising;
bool raisings[MAX_W];
int active[MAX_W];

int main(){
  // INPUT
  scanf("%d%d",&h,&w);
  int mask_max = 1<<w;
  for(int i=0;i<h;++i)for(int j=0;j<w;++j){
    int tmp;
    scanf("%d",&tmp);
    p[i][j] = (double)tmp/100.0;
  }
  for(int i=0;i<h;++i)for(int j=0;j<w;++j){
    scanf("%d",&s[i][j]);
    s[i][j] = 4-s[i][j];
  }
  result = 0.0;
  raised[0][0] = 1.0;
  for(int i=0;i<h;++i){
    // if know then bit 1, else then bit 0
    for(int nowmask=0;nowmask<mask_max;++nowmask){
      Real rate = 1.0;
      for(int j=0;j<w;++j){
        if(nowmask>>j & 1 == 1){
          rate *= p[i][j];
          know[j] = true;
        }else{
          rate *= (1.0-p[i][j]);
          know[j] = false;
        }
      }
      if(rate<EPS)continue;

      for(int beforemask=0;beforemask<mask_max;++beforemask){
        if(raised[i][beforemask]<EPS)continue;

        for(int j=0;j<w;++j){
          raisings[j] = false;
          active[j] = s[i][j]+(int)(beforemask>>j&1==1);
        }
        for(int j=0;j<w;++j){
          if( active[j]>=4 && know[j] ){
            raisings[j] = true;
          }
        }
        // from front & left
        for(int j=1;j<w;++j){
          if( !raisings[j] && active[j]>=3 && know[j] && raising>>(j-1)&1==1 ){
            raisings[j] = true;
          }
        }
        // from front & right
        for(int j=w-2;j>=0;--j){
          if( !raisings[j] && active[j]>=3 && know[j] && raising>>(j+1)&1==1 ){
            raisings[j] = true;
          }
        }
        // from front & left & right
        for(int j=1;j<w-1;++j){
          if( !raisings[j] && active[j]>=2 && know[j] &&
            raising>>(j-1)&1==1 && raising>>(j+1)&1==1 ){
            raisings[j] = true;
          }
        }
        raising = 0;
        for(int j=0;j<w;++j){
          raising <<= 1;
          if(raisings[w-1-j])raising += 1;
        }
        raised[i+1][raising] += rate*raised[i][beforemask];
      }
    }
  }
  for(int mask=1;mask<mask_max;++mask){
    double cnt = (double)__builtin_popcount(mask);
    for(int i=0;i<h;++i){
      result += raised[i+1][mask]*cnt;
    }
  }

  printf("%.15f\n",result);
  return 0;
}