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# The Question is: Adding in __imul__, which does in-place multiplication.

what is the problem, i can't undrestand...

numstring.py
```class NumString:
def __init__(self, value):
self.value = str(value)

def __str__(self):
return self.value

def __int__(self):
return int(self.value)

def __float__(self):
return float(self.value)

if '.' in self.value:
return float(self) + other
return int(self) + other

return self + other

self.value = self + other
return self.value

def __mul__(self, other):
if '.' in self.value:
return float(self) * other
return int(self) * other

def __rmul__(self, other):
if '.' in self.value:
return float(self) * other
return int(self) * other

def __imul__(self, other):
if '.' in self.value:
return float(self) *= other
return int(self) *= other
```

You are very close. Notice how in the in-place method `__iadd__`, the value of `self.value` is updated before the `return`. This is what makes it work in place: the object value changes and is not just used to return a value. Add assignments to `self.value` and it should pass.