#include<iostream>
using namespace std;
int main(){
double chieuDai, chieuRong, chuVi, dienTich;
cout <<"2:";cin >>chieuDai;
cout <<"4:"; cin >>chieuRong;
chuVi = (chieuDai+chieuRong)*2;
dienTich = chieuDai*chieuRong;
cout <<"Chu vi la:" <<chuVi;
cout <<"\nDien tich la:" <<dienTich;
return 0;
}
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