def is10(x):
    c = 0
    while x%10==0:
        x //= 10
        c += 1
    if abs(x) <= 9 and c >= 2:
        return (c,x)
    else:
        return (-1,-1)

A,B = map(int,input().split())
if A==0 or B==0:
    print(0)
    exit()
n,a = is10(A)
m,b = is10(B)
if n >= 2 and m >= 2:
    print(a*b*10**(n+m-1))
else:
    x = A*B
    if abs(x) < 10**8:
        print(x)
    else:
        print("E")