Write a program that calculates the area of a triangle.

The formula for the area of a triangle is:

\[\text{Area} = \frac{\text{base} \times \text{height}}{2}\]

Input

The program should prompt for:

  1. Enter the base in cm:
  2. Enter the height in cm:

Both values are entered as decimals (floats).

Output

The area of the triangle is area cm²

Example

Input:

10.0
5.0

Output:

The area of the triangle is 25.0 cm²