# Can't understand arithmetic formatter errors

Tell us what’s happening:
I can’t grasp what is wrong here, it prints exactly how it should (at least I think so) but I get error reports about improper formatting. I’ve looked through the forum and found tips about error results and what they mean, but I still don’t understand.

``````def arithmetic_arranger(problem, solve=False):
up = ""
down = ""
wynik=""
odp=""
dashes=""
drow=""

ile = len(problem)
if ile>5:
return "Error: Too many problems."
for dzialanie in problem:
dzialanie=dzialanie.split()
first=dzialanie[0]
second=dzialanie[2]
sign=dzialanie[1]
if sign != "-" and sign != "+":
return "Error: Operator must be '+' or '-'."
if len(first)>4 or len(second)>4:
return "Error: Numbers cannot be more than four digits."
if first.isdecimal() is False or second.isdecimal() is False:
return "Error: Numbers must only contain digits."
lenght =max(len(str(first)), len(str(second))) + 2
top =str(first).rjust(lenght)
bottom =sign + str(second).rjust(lenght - 1)
up +=top + '    '
down +=bottom + '    '
if sign=="+":
wynik=int(first) + int(second)
if sign=="-":
wynik=int(first) - int(second)
result = str(wynik).rjust(lenght)
odp += result + '    '
if len(str(bottom)) > len(str(top)):
if len(str(bottom)) > len(str(result)):
for i in range (len(str(bottom))):
dashes = dashes + "-"
else:
for i in range (len(str(wynik))):
dashes = dashes + "-"
else:
for i in range(len(str(top))):
dashes = dashes + "-"
drow += dashes + '    '
dashes=""
if solve is True:
arranged_problems =up + '\n' + down + '\n' + drow + '\n' + odp
else:
arranged_problems =up + '\n' + down + '\n' + drow
return arranged_problems
``````

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