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2066. Body Mass Index #1

Write a program that calculates the body mass index, I=m/h2​, where m is the body weight in kilograms, h is the height in meters.

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Output the result on the console.


Input

The first line contains a natural number,m(1m100).

The second line contains a decimal number,h(1.00h2.00).

Output

Output the answer to the problem.


Sample input 1

69
1.78

Sample output 1

21.7

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