#include<stdio.h>
main()
{
	char fin[100], fout[100];
	for(int t = 1 ; t <= 5 ; t++ )
	{
		sprintf(fin,".%d.in",t);
		sprintf(fout,".%d.out",t);
		freopen(fin,"r",stdin);
		freopen(fout,"w",stdout);
		int n, m, k, a, b, c, s = 0;
		scanf("%d%d%d",&n,&m,&k);
        printf("%.2lf MB",(n*m*k)/8./1024/1024);
    }
}