#include <stdio.h>
#include <stdlib.h>
int main() {
int x1, x2, x4, x5;
float x3, x6, x7, x8,x9;
scanf("%d %d %f %d %d %f",&x1 ,&x2,&x3,&x4,&x5,&x6);
x7 = x2 * x3 ;
x8 = x5 * x6 ;
x9 = x7 + x8 ;
printf("VALOR A PAGAR: R$ %.2f \n",x9);
return 0;
}