S = input()
f = ''
L = []
for i in range(len(S)):
    if S[i].isnumeric() and i != len(S)-1:
        f += S[i]
    elif S[i] == '+' or S[i] == '*':
        L.extend([f,S[i]])
        f = ''
    elif i == len(S)-1:
        f += S[i]
        L.append(f)
ans = int(L[0])
for i in range(len(L)//2):
    if L[2*i+1] == '+':
        ans *= int(L[2*i+2])
    elif L[2*i+1] == '*':
        ans += int(L[2*i+2])
print(ans)