> #include<iostream.h>
> #include<fstream.h>
> 
> 
> //#decine length 6 95123
> #define distingish 48
> unsigned int result[151];//the result of computation
> unsigned int temp_forStore[151];
> void main()
> {
> //	fstream cin("in.txt",ios::in||ios::out);
> //	fstream fout("out.txt",ios::out);
> 	char input[7];//Rn where R 
> 	int real[7];// R is a real number ( 0.0 < R < 99.999 ) 
> 	int point=0;
> 	real[0]=6;
> 	int n;//n is an integer such that 0 < n <= 25
> 	cin>>input>>n;
>  
> 	int i,j,k;
> /**/
> 	for(i=0;i<6;i++)//initialize the point
> 	{
> 		if(input[i]=='.')
> 		{
> 			point=5-i;
> 			real[0]--;
> 			for(j=i+1;j<6;j++)
> 				input[j-1]=input[j];
> 			break;
> 		}
> 	}
> 
> 	for(i=real[0]-1;i>=0;i--)
> 	{
> 		if(input[i]=='0')
> 		{
> 			real[0]--;
> 			point--;
> 		}
> 		else
> 			break;
> 	}
>  
> 
> 	point*=n;
> 	for(j=1;j<=real[0];j++)
> 	{
> 		real[j]=input[real[0]-j]-distingish;
> 		result[j]=real[j];//initialize the temp_forStore[]
> 	}
> 
> 	result[0]=real[0];//the number of digits in temp_forStore[] presently
>  
> 	unsigned int product;
> 
> 	for(i=1;i<n;i++)//times for producting the real[]
> 	{
> 		for(j=1;j<=real[0];j++)
> 		{
> 			 for(k=1;k<=result[0];k++)
> 			 {
> 				 product=result[k]*real[j];
> 				 temp_forStore[k+j-1]+=product;
> 				 temp_forStore[k+j]+=temp_forStore[k+j-1]/10;	
> 				 temp_forStore[k+j-1]%=10;
> 				 
> 			 }//end temp_forStore[]
> 		}//end real[]
> 		for(k+=j;k>0;k--)
> 			if(temp_forStore[k]!=0)
> 				break;
>  
> 		temp_forStore[0]=k;
> 		//copy the temp_forStore[] to result[]
> 		for(;k>=0;k--)
> 		{
> 			result[k]=temp_forStore[k];
> 			temp_forStore[k]=0;
> 
> 		}
> 
> 	}//end n
>  
>  	if(result[0]>point)
> 		i=result[0];
> 	else
> 		i=point;
> 		
>  
> 
> 		for(;i>0;i--)
> 		{		
> 			if(i==point)
> 				cout<<'.';		
> 			cout<<result[i];
> 		}
> 	cout<<endl;
> }