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

def getDivMod(p) :
    cnt = 0
    x = p
    while True :
        x,y = divmod(x,10)
        if y != 0 :
            cnt = 0
            breakå
        if 0 < abs(x) and abs(x) <= 9 :
            cnt += 1
            break
        else :
            cnt += 1
    return x,cnt

d1,z1 = getDivMod(a)
if z1 != 0 :
    d2,z2 = getDivMod(b)

multi = 0

if z1 >= 2 and z2 >=2  :
    multi = d1 * d2
    answer = str(multi) + "0"*(z1 + z2 -1)
else :
    multi = a * b
    if -99999999 <= multi and multi <= 99999999:
        answer = str(multi)
    else :
        answer = 'E'
print(answer)