Feet and Inches Conversion 2

Problem Description

Americans are used to the imperial system of measurement, and commonly express height as "so many feet and so many inches". Given an American's height as $f$ feet and $i$ inches, convert it to metres ($m$) and output it.

It is known that: $1$ foot = $12$ inches, and $1$ inch = $2.54$ centimetres = $0.0254$ metres.

Input Format

The input gives one line containing two non-negative integers $f$ and $i$, representing the number of feet and the number of inches respectively, separated by a space.

Output Format

Output one line, the corresponding height (in metres), kept to two decimal places.

Sample Input

5 7

Sample Output

1.70

Constraints

$0 \le f \le 10$, $0 \le i \le 11$ (the number of inches does not exceed $11$, since 12 inches make 1 foot).

Hint

• Conversion chain: first unify into total inches, then multiply by 0.0254 to get metres. The unit is metres, not centimetres — getting the order of magnitude wrong is immediately visible in the sample.
• Keep two decimal places.
• Verify with the sample: 5 7 → 1.70.