from sys import stdin

def calc1(x, y):
    return (x * y) // 10

def calc2(x, y):
    ret = x * y
    if ret // 100000000:
        return 'E'
    else:
        return ret

def main():
    A, B = map(int, input().split())

    if not A or not B:
        print(0)
        return

    for n in (abs(A), abs(B)):
        m = 0
        while not m:
            d, m = divmod(n, 10)
            n //= 10
        if d:
            ans = calc2(A, B)
            break
    else:
        ans = calc1(A, B)

    print(ans)

input = lambda: stdin.readline()
main()