322 - Trapezium

Trapezium

Time Limit: 1 sec

**The Problem**

** **A **Trapezium**’**s** has two parallel side. From this two parallel sides One Side and Height is given. Other Side is 2 times of One Side.

Your task is to find the **Area** of **Trapezium**.

**The Input**

Input file contains a series of line. Each line contains two integer number One side of the **Trapezium**, **A (A<=10000) **and height of the **Trapezium**, **H (H<=10000). **Input is terminated by EOF.

**The Output**

For each line of input output will show the **Area** of** Trapezium**, rounded to 2 decimal points in a separate line.

**Sample Input**

10000 10000

1234 1234

333 333

**Sample Output**

150000000.00

2284134.00

166333.50

Problem Setter: Samia Safa Ahmed