/*
#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",(a&&!b)||(!a&&b));
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",a==b);
return 0;
}
#include<stdio.h>
int main()
{
long long int h,b,c,s;
scanf("%lld %lld %lld %lld",&h,&b,&c,&s);
printf("%.2lldMB",(h*b*c*s)/8/1024);
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d,%d",&a,&b);
printf("%d",a >= b ? 1:0);
return 0;
}
#include<stdio.h>
int main()
{
int a,b,c,d;
scanf("%d %d %d",&a,&b,&c);
d = (a>b ? b:a);
printf("%d",d>c ? c:d);
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",a == b ? 1:0);
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",a != b ? 1:0);
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d",&a);
if (a == 0)
printf("1");
else
printf("0");
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",a && b);
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",a || b);
return 0;
}
#include<stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",a > b ? a:b);
return 0;
}
#include<stdio.h>
int main()
{
int a,b,c;
scanf("%d %d",&a,&b);
printf("%d",a >= b ? 1:0);
return 0;
}
자료형
정수 int %d
long long int %lld
실수 float %f
double %lf
문자 char %c
*/
#include<stdio.h>
int main()
{
int h,b,c,s;
scanf("%d %d %d %d",&h,&b,&c,&s);
printf("%.1lfMB", h*b*c*s/(8*1024*1024));
return 0;
}