/*   Description:    基本思想很简单：把double型当做字符串进行读入，然后提取出double的各个数到int型   数组中，模拟手算进行大整数乘法。   注意：要事先计算出小数点的位置，输出的时候加以控制即可！ */ #include<iostream> #include<cmath> #include<cstring> #include<cstdio> #include<algorithm> #include<string> #include<vector>

using namespace std;

typedef string::size_type size_type;

int ans[10024 + 10];

void Print(int *d, int size) {     for(int i = size - 1; i >= 0; --i)       cout<<ans[i]<<" ";     cout<<endl; }

int Transfer(int *d, int size) {     int res = 0;     memset(ans, 0, sizeof(ans));         for(int i = 0; i < size; ++i){       res = res*10 + d[i];       ans[size-1-i] = d[i];     }     return res; }

void Multiply(int& size, int r) {     int sh = 0;     for(int i = 0; i < size; ++i){        int temp = ans[i]*r + sh;        ans[i] = temp%10;        sh = temp/10;     }     int k = size;     if(sh > 0){        while(sh){           ans[k++] = sh%10;           sh /= 10;        }        size = k;     } }

int main() {    string dl;    int n;    while(cin>>dl>>n){        size_type pos = dl.find('.', 0);        int d[6] ;        bool sign = 0;        int index = 0;        if(pos == string::npos)           pos = dl.size();                     /*  begin-->提取出double*/        for(size_type i = 0; i < pos; ++i)           if(sign){              d[index++] = dl[i] - '0';           }           else if(dl[i] != '0'){              d[index++] = dl[i] - '0';              sign = 1;           }        size_type up = dl.size() - 1;        while(dl[up] == '0')           --up;        for(size_type i = pos+1; i <= up; ++i)          d[index++] = dl[i] - '0';          /*        end      */               int r = Transfer(d, index);               int size = index;        for(int i = 1; i < n; ++i)         Multiply(size, r);        int point_pos = (up - pos)*n - 1;               if(point_pos > size-1){           cout<<".";           for(int i = point_pos; i >= size; --i)             cout<<0;        }               for(int i = size - 1; i >= 0; --i){            if(i == point_pos)              cout<<".";            cout<<ans[i];        }        cout<<endl;    }    //system("pause");    return 0; }