Problem B Back to High School Physics

Problem B

Back to High School Physics

Input: standard input

Output: standard
output

A
particle has initial velocity and constant acceleration. If its velocity after
certain time is v then what will its displacement be in twice of that time?

Input

The input will contain two integers in each line. Each
line makes one set of input. These two integers denote the value of v (-100
<= v <= 100) and t(0<=t<= 200) ( t means at the time the particle
gains that velocity)

Output

For
each line of input print a single integer in one line denoting the displacement
in double of that time.

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Sample Input

0 0
5
12

Sample Output

0
120

___________________________________________________________________________________
Shahriar
Manzoor