#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int ans[200];
int Get[10];
char Cin[10];
int mul;
void func(){
	int temp[200] = {0};
	for(int i = 1; i <= ans[0]; ++i){
		for(int j = 1; j <= Get[0]; ++j){
			temp[i+j-1] += ans[i]*Get[j];
			temp[i+j] += temp[i+j-1] / 10;
			temp[i+j-1] = temp[i+j-1] % 10;
		}
	}
	int num = ans[0]+Get[0];
	while(temp[num] == 0)num--;
	ans[0] = num;
	for(int i = 1; i <= num; ++i)ans[i] = temp[i];
	return ;
}
int main(){
	while(cin >> Cin >> mul){
		int num = 1;
		int pos = -1;
		int flag = 0;
		if(Cin[0] == '0')flag = 1;
		for(int i = strlen(Cin) - 1; i >= 0; --i){
			if(Cin[i] == '.'){
			pos = strlen(Cin) - i;
			continue;
		}
			Get[num++] = Cin[i] - '0';
		}
		if(pos == -1)pos = 1,Get[0] = strlen(Cin);
		else
			Get[0] = strlen(Cin) - 1;
		ans[0] = Get[0];
		for(int i = 1; i <= Get[0]; ++i)ans[i] = Get[i];
		for(int i = 1; i < mul; ++i){
			func();
		}
		int l = 1,r = ans[0];
		while(ans[l] == 0 && l <= (pos-1)*mul)l++;
		if(flag){
			cout << "0.";
			for(int i = (strlen(Cin)-2)*mul; i >= l; --i){
				if(i > ans[0])cout << 0;
				else
					cout << ans[i];
			}
			cout << endl; 
		}
		else{
		for(int i = r; i >= l; --i){
			if(i == (pos-1) * mul)cout << '.';
			cout << ans[i];
		}
		cout << endl;
	}
		memset(ans,0,sizeof(ans));
		memset(Get,0,sizeof(Get));
	}
	return 0;
}