#include<stdio.h>int main(){double sum;int k,n;while(scanf("%d",&n)==1&&n){k=0;sum=(n+1)*1.0*n/6.0*(n+2);//必须用n/6.0才能过while(sum>=10){sum/=10.0;k++;}printf("%.2lfE%d\n",sum,k);}return 0;}