#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define all(x) begin(x), end(x)

const int N = 1e4;
mt19937 rnd;
double a[N], b[N];

int main() {
	for (int i = 0; i < N; ++i) {
		a[i] = rnd();
	}
	for (int i = 0; i < N; ++i) {
		b[i] = rnd();
	}
	
	auto st = chrono::system_clock::now();
	
	double h = 0;
	for (int it = 0; it < N; ++it) {
		for (int i = 0; i < N; ++i) {
			double cur = a[i] / b[i];
			h += cur;
		}
	}
	
    auto fn = chrono::system_clock::now();
    
    assert(h != 19);
    
    cout << fixed << setprecision(1) << 1000 * chrono::duration<double>(fn - st).count() << endl;
	
	return 0;
}