Beleg/b.py

import re
s=[]
o1=raw_input()
s.append(o1)
for i in range(1,10):
    o2=raw_input()
    if o2 != '=':
        o3=list(o2)
        o4=s+o3
    else:
        break
if '+' in o4:
    a=o4.index('+')
elif '-' in o4:
    a=o4.index('-')
elif '*' in o4:
    a=o4.index('*')
elif '/' in o4:
    a=o4.index('/')
if o4[a] == '+':
    o=float(o4[a-2])+float(o4[a-1])
elif o4[a] == '-':
    o=float(o4[a-2])-float(o4[a-1])
elif o4[a] == '*':
    o=float(o4[a-2])*float(o4[a-1])
elif o4[a] == '/':
    o=float(o4[a-2])/float(o4[a-1])
print o