## Task
Write a method `remainder` which takes two integer arguments, `dividend` and `divisor`, and returns the remainder when dividend is divided by divisor. Do NOT use the modulus operator (%) to calculate the remainder!
#### Assumption
Dividend will always be `greater than or equal to` divisor.
#### Notes
Make sure that the implemented `remainder` function works exactly the same as the `Modulus operator (%)`.
```if:java
`SimpleInteger` is a tiny and immutable implementation of an integer number. Its interface is a very small subset of the `java.math.BigInteger` API:
* `#add(SimpleInteger val)`
* `#subtract(SimpleInteger val)`
* `#multiply(SimpleInteger val)`
* `#divide(SimpleInteger val)`
* `#compareTo(SimpleInteger val)`
```
def remainder(dividend, divisor):
    return dividend - (dividend//divisor)*divisor
def remainder(dividend, divisor):
    return dividend - (dividend//divisor)*divisor