def main():
    s=input()
    k=s.split("+")
    l=[]
    for i in k:
        l.extend(map(int,i.split("*")))
    m=[]
    for i in s:
        if i in ["+","*"]:
            m.append(i)
    # print(l)
    # print(m)
    ans=l[0]
    for i in range(len(m)):
        if m[i]=="*":
            ans+=l[i+1]
        else:
            ans*=l[i+1]
    print(ans)
    
if __name__=="__main__":
    main()