#include<iostream>
#include<iomainp>
using namespace std;

class A{double c,d;public:A(double a,double b){c=a;d=b;}
voids(){cout<<fixed<<setprecision(3)<<8.99e9*c*c/(d*d);}};

int main(){
    double c,d;
    cin>>c>>d;
    A x(c,d);
    x.s();}