C++ 计算长方形面积和周长

#include <iostream>
using namespace std;

int main() {
    int length, width;
    cin >> length >> width;
    
    int area = length * width;
    int perimeter = 2 * (length + width);
    
    cout << area << endl;
    cout << perimeter << endl;
    
    return 0;
}