#include <bits/stdc++.h> using namespace std; int a, b, c; int main() { cin >> a >> b >> c; cout << (a / c) * (b / c); return 0; }
#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c,d,e; cin>>a>>b>>c; e=a/c; d=b/c; cout<<e*d;
快递盒不用管高度 横 可以放长方形长除正方形边长个 竖 可以放长方形宽除正方形边长个 一共可以放横乘竖个。
```#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; int ch=a/c; int cu=b/c; cout<<ch*cu; return 0; }
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