from sys import stdin



def main():

  read = stdin.readline

  A, B = list(map(int,read().split(" ")))

  print((A*B))

  

  

if __name__ == "__main__":

  main()
from sys import stdin



def main():

  read = stdin.readline

  A,B = list(read().split(" "))

  B = int(B)*100

  c = int(A) * B

  print((c//100))

  

  

  

if __name__ == "__main__":

  main()

from sys import stdin


def main():
    read = stdin.readline
    A, B = list(map(int, read().split(" ")))
    print((A * B))


if __name__ == "__main__":
    main()

from sys import stdin


def main():
    read = stdin.readline
    A, B = list(read().split(" "))
    B = int(B) * 100
    c = int(A) * B
    print((c // 100))


if __name__ == "__main__":
    main()

-    A, B = list(map(int, read().split(" "))) -    print((A * B)) +    A, B = list(read().split(" ")) +    B = int(B) * 100 +    c = int(A) * B +    print((c // 100))