#include <stdio.h>

int main(int argc, char* argv[])
{
double price;
int liter;

printf("ガソリン単価を入力 : ");
scanf("%lf", &price);

liter = 10;
LOOP:
printf("%3dl %.2f円\n", liter, liter * price);
if(liter < 50){
liter += 5;
goto LOOP;
}

return 0;
}