#include<bits/stdc++.h> using namespace std; int n, m, a[106][106], b[106][106]; double q, p; int main( ) { cin >> n >> m; q = n * m; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { cin >> a[i][j]; } } for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { cin >> b[i][j]; } } for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { if (a[i][j] == b[i][j]) { p++; } } } cout << fixed << setprecision(2) << (p / q) * 100; return 0; }