import re
import math

s = "0.00001*0.1/0.000001"

def small_calc(tup):
    f1,sign,f2 = tup
    f1 = float(f1)
    f2 = float(f2)

    if sign == "*":
        result = f1*f2
    elif f2 != 0 and sign == "/":
        result = f1/f2
    elif sign == "+":
        result = f1+f2
    elif sign == "-":
        result = f1-f2
    else:
        result = "Some error"
    return(result)

def calc(string):
    res = re.split('(\+|\-|\/|\*|\(|\))', string)

    res = list(filter(None, res))

    if "(" in res:
        s1,s2 = res.index("("), res.index(")")
        small = res[s1+1:s2]
        del(res[s1:s2+1])
        r1 = small_calc(small)
        res.insert(s1,r1)
        r2 = small_calc(res)
        return(r2)
    else:
        if "/" in res:
            s1 = res.index("/")
            small = res[s1-1:s1+2]
            del(res[s1-1:s1+2])
            r1 = small_calc(small)
            if round(s1/5) == 0:
                res.insert(0,r1)
            else:
                res.insert(len(res),r1)
            r2 = small_calc(res)
            return(r2)
        elif "*" in res:
            s1 = res.index("*")
            small = res[s1-1:s1+2]
            del(res[s1-1:s1+2])
            r1 = small_calc(small)
            if round(s1/5) == 0:
                res.insert(0,r1)
            else:
                res.insert(len(res),r1)
            r2 = small_calc(res)
            return(r2)

print(calc(s))