# include<iostream> using namespace std; int n,m,k=0; int a[100][100]; int b[100][100]; int main(){ cin >>n>>m; for(int i=0;i<=n-1;i++){ for(int j=0;j<=m-1;j++){ cin >>a[i][j]; } } for(int i=0;i<=n-1;i++){ for(int j=0;j<=m-1;j++){ cin >>b[i][j]; if(a[i][j]==b[i][j]){ k++; } } } double x =(double)k/(n*m)*100; printf ("%.2lf",x); return 0; }