1079.cpp

#include<conio.h>
#include<stdio.h>

int main(){
	double x,y;
	scanf("%lf",&x);
	for(int i=1;i<=x;i++){
	double x1,x2,x3;	
		scanf("%lf%lf%lf",&x1,&x2,&x3);
		
	printf("%.1lf\n",(x1*2+x2*3+x3*5)/(2+3+5));	
		
		
		
		
		
		
		
		
		
	} 
}