#coding: utf-8
#yuki_49

s=raw_input()
ls=list(s)
s2=[]

i=0
while i<len(s):
 if ls[i]=='+':
  s2.insert(0,'(')
  s2.append(')')
  s2.append('*')
  s2.append(ls[i+1])
  i+=2
 elif s[i]=='*':
  s2.insert(0,'(')
  s2.append(')')
  s2.append('+')
  s2.append(ls[i+1])
  i+=2
 else:
  s2.append(ls[i])
  i+=1

exp="".join(s2)
print eval(exp)