We are familiar with infix notation for representing expressions, where the operator is placed infix between the operands, as in 5 * 5. Given an expression in postfix notation, such as 5 5 *, evaluate the expression and print it to standard output, rounded to one decimal place.

Valid operands are * (multiplication), / (division), + (addition), - (subtraction), % (mod), and ^ (exponentiation).

Input Format

A valid postfix expression. The input will have no more than ~50~ characters, and the value of each number in the input and each intermediate result will be less than or equal to ~1000~.

Output Format

The result of the evaluation. The answer will be considered correct if its absolute or relative error does not exceed ~10^{-1}~.

Sample Input 1

5 5 +

Sample Output 1

10.0

Sample Input 2

5 5 + 6 * 8 -

Sample Output 2

52.0