C :

#include<stdio.h>
int main()
{
int x,y;
double f;
scanf("%d%d",&x,&y);
f=(87*x+85*y)/(1.0*(x+y));
printf("%0.1lf",f);
}

C++ :

#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
	int x1,y1;
	cin>>x1>>y1; 
	printf("%0.1f\n",float(x1*87+y1*85)/(x1+y1)); 
	return 0;
}

Python :

# coding=utf-8
x,y = map(int, input().split())
t=(x*87+y*85)/(x+y)
print('%.1f'%t)