Compute $A \times B,$ truncate its fractional part, and print the result as an integer.

-----Constraints-----
- $0 \leq A \leq 10^{15}$
- $0 \leq B < 10$
- A is an integer.
- B is a number with two digits after the decimal point.

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

-----Output-----
Print the answer as an integer.

-----Sample Input-----
198 1.10

-----Sample Output-----
217

We have $198 \times 1.10 = 217.8.$ After truncating the fractional part, we have the answer: 217.

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