S = input()
S = S.replace("*", "-")
S = S.replace("+", "*")
S = S.replace("-", "+")
while S.count("*") + S.count("+") > 0:
    if S.count("*") + S.count("+") == 1:
        print(eval(S))
        exit()
    i = 1000
    if "*" in S:
        i = min(i, S.index("*"))
    if "+" in S:
        i = min(i, S.index("+"))
    j = 1000
    if "*" in S[i + 1:]:
        j = min(j, S[i + 1:].index("*"))
    if "+" in S[i + 1:]:
        j = min(j, S[i + 1:].index("+"))
    j += i + 1
    S = str(eval(S[:j])) + S[j:]