Evaluate Arithmetic Expression

You are given a simple arithmetic expression in the form of \(term\; operator\; term\). The two terms can be integers or decimals and the operator can be one of the following: \(+\), \(-\), \(\times\) (asterisk *), or \(\div\) (slash /). When performing division by zero, output None.

The result should be printed as an integer if it has no fractional part; otherwise, it should be printed as a floating-point number.

inputFormat

The input is provided from stdin as a single line containing the expression in the format:

term operator term

Examples:

3 + 5
10.5 / 2.0

outputFormat

Output the evaluated result to stdout. If division by zero occurs, output None. If the result is a whole number, output it as an integer; otherwise as a floating-point number.

3 + 5

8