b$.$ Liam$$s strategy for solving $4425$:

$$For doing this multiplication I use $100.$ I know that $25$ is actually $1004,$ so I do $441004=114$

$1004.$ Now I can cancel out the $4,$ and after that, it is just an easy problem. It$$s just $11100$

which is $1100.$

Apply Liam$$s strategy to solve $9625$:

$($Show your solution using Liam$$s approach