#include <iostream>

int main()
{
  double lhs = 0, rhs;
  char operand;
  std::cin >> lhs;
  while (std::cin >> operand >> rhs)
    {
      switch(operand)
        {
        case '+': lhs += rhs; break;
        case '-': lhs -= rhs; break;
        case '*': lhs *= rhs; break;
        case '/': lhs /= rhs; break;
        }
      std::cout << "Zwischenergebnis: " << lhs << '\n';
    }
}