C :

#include<stdio.h>

int main()
{  int a,b,d,e;
  double c,f;
  scanf("%d%d%lf",&a,&b,&c);
  scanf("%d%d%lf",&d,&e,&f);
    printf("VALOR A PAGAR: R$ %.2f",b*c+e*f);
    return 0;
}

C++ :

#include<stdio.h>
int main()
{
	int a,b,d,e;
	double c,f,VALOR;
	scanf("%d %d %lf",&a,&b,&c);
	scanf("%d %d %lf",&d,&e,&f);
	VALOR=b*c+e*f; 
	printf("VALOR A PAGAR: R$ %.2f",VALOR);
	return 0;
}