#include<bits/stdc++.h> using namespace std; int main() { double x,y;

cin>>x>>y;
 double c=(x*87+y*85)/(x+y);
cout<<fixed<<setprecision (4)<<c;

// cout<<c;

return 0;

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	double n=(a*87+b*85)*1.0/(a+b);
	printf("%.4lf",n);
	return 0;
}

你也被骗了

你被骗了