Question

What is the answer?

Answer 1

H `3.09`

Explanation:

I'm not 100% sure, but the model of multiplication you are using is something along the lines of adding parts of each product, as in breaking each down.

Something like your problem would be broken into:
`10` and `8` (`18`) times `14` and `0.39` (`14.39`).

You would have:
`(10*14)+(8*14)+(10*0.39)+(8*0.39)`, which simplifies to:
`140+112+3.9+3.12`

In the example given, Kanye miscalculates `10*0.39` to be `3.09`, when in reality it is `3.9`.

Based on this, his written value of `3.09` is incorrect.