/**************************************************************

   作者：陈新

   邮箱：cx2pirate@gmail.com

   用途：hdu1237

   时间：2014.3.4 23:17

   编译环境 : g++

   数据：10308543    2014-03-15 20:45:36    Accepted    1237    140MS    424K    1948 B    G++    超级旅行者

  *************************************************************/

 #include <iostream>

 #include <stack>

 #include <iomanip>

 using namespace std;

 typedef struct{

     stack<double> nums;

     char op;

 }EXPRESSION;

 bool endingCheck();

 double caculate(double firstNum,double secondNum,char op);

 void caculateExpression(EXPRESSION * pExpr);

 int main(){

     EXPRESSION expr;

     double firstNum = ;

     while(cin >> firstNum){

         if(endingCheck())

         {

             if(firstNum != ){

                 cout << fixed << setprecision() << firstNum << endl;

                 continue;

             }

             else{

                 break;

             }

         }

         else{

             expr.nums.push(firstNum);

         }

         char op;

         while(op = cin.get()){

             double thirdNum;

             cin >>  thirdNum;

             if(op == '+' || op == '-'){

                 caculateExpression(&expr);

                 expr.nums.push(thirdNum);

                 expr.op = op;

             }

             else{

                 double secondNum = expr.nums.top();

                 expr.nums.pop();

                 expr.nums.push(caculate(secondNum,thirdNum,op));

             }

             if(endingCheck()){

                 caculateExpression(&expr);

                 break;

             }

         }

         cout << fixed << setprecision() << expr.nums.top() << endl;

         expr.nums.pop();

     }

     return ;

 }

 bool endingCheck(){

     return cin.get() == '\n';

 }

 double caculate(double firstNum,double secondNum,char op){

     if(op == '+'){

         return firstNum + secondNum;

     }

     else if(op == '-'){

         return firstNum - secondNum;

     }

     else if(op == '*'){

         return firstNum * secondNum;

     }

     else if(op == '/'){

         return firstNum / secondNum;

     }

 }

 void caculateExpression(EXPRESSION * pExpr){

     if(pExpr ->nums.size() == ){

         return;

     }

     else{

         double secondNum = pExpr ->nums.top();

         pExpr ->nums.pop();

         double firstNum = pExpr ->nums.top();

         pExpr ->nums.pop();

         pExpr ->nums.push(caculate(firstNum,secondNum,pExpr ->op));

     }

 }