#include <bits/stdc++.h>
using namespace std;
double a,b;
int main()
{
cin>>a>>b;
cout<<"Chu vi la: "<<fixed<<setprecision(2)<<(a+b)*2<<endl;
cout<<"Dien tich la: "<<fixed<<setprecision(2)<<a*b;
return 0;
}
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