没数据。

#include<bits/stdc++.h>
#define int long long
#define INF 0x3f3f3f
using namespace std;
int n;
double k;
signed main(){
	cin>>n;
	cin>>k;
	cout<<n*1.0*k<<"\n";
	cin>>k;
	cout<<n*1.0*k<<"\n";
	cin>>k;
	cout<<n*1.0*k<<"\n";
	cin>>k;
	cout<<n*1.0*k<<"\n";
	return 0;
}