#include<stdio.h>
#include<math.h>
int main()
{	int t,n,log,po;
	printf("\nTest Cases:");
	scanf("%d",&t);
	while(t--)
	{	printf("\nNumber:");
		scanf("%d",&n);
		log=log10(n);
		printf("\nlog=%d\n",log);
		po=pow(10,log);
		printf("pow(10,log)=%d\n",po);
		po=pow(10,log-1);
		printf("pow(10,log-1)=%d\n",po);
		po=pow(10,log);
		printf("pow(10,log)=%d\n",po);
		po=pow(10,log)/10;
		printf("pow(10,log)/10=%d\n\n",po);
	}
	return 0;
}