Problem Statement

We have a drink that has A kilocalories of energy per 100 milliliters. How many kilocalories of energy does B milliliters of this drink have?

Input

Input is given from Standard Input in the following format:
A B

Output

Print a number representing the answer.
Your output is considered correct when its absolute or relative error from our answer is at most 10^{-6}.

Constraints

• $0 \leq A, B \leq 1000$
• All values in input are integers.

Sample Input 1

45 200

Sample Output 1

90

We have a drink that has 45 kilocalories of energy per 100 milliliters. 200 milliliters of this drink has 90 kilocalories of energy.

Sample Input 2

37 450

Sample Output 2

166.5

The answer may not be an integer.

Sample Input 3

0 1000

Sample Output 3

0

Sample Input 4

50 0

Sample Output 4

0

见题面 Input 部分

见题面 Output 部分