import sys

def input(): return sys.stdin.readline().strip()



def resolve():

    a,b=list(map(int, input().split()))

    print((a*b))

resolve()
import sys

def input(): return sys.stdin.readline().strip()



def resolve():

    a,b=list(map(float, input().split()))

    b100=b*100

    print((int(a*b100/100)))

resolve()
import sys


def input():
    return sys.stdin.readline().strip()


def resolve():
    a, b = list(map(int, input().split()))
    print((a * b))


resolve()

import sys


def input():
    return sys.stdin.readline().strip()


def resolve():
    a, b = list(map(float, input().split()))
    b100 = b * 100
    print((int(a * b100 / 100)))


resolve()

-    a, b = list(map(int, input().split())) -    print((a * b)) +    a, b = list(map(float, input().split())) +    b100 = b * 100 +    print((int(a * b100 / 100)))