First, the operation law.
Multiplicative commutative law (for example:125x34x8 =125x8x34)
Multiplicative associative law (for example:123x25x40 =123x (25x40))
Multiplicative distribution law (for example: axb+axc=ab+ac) In addition, there are many variants of the multiplicative distribution law that need attention, such as adding 1.
Second, the resolution is sufficient (for example:125x32x25 =125x8x4x25)
This is a simple operation of multiplication, so the specific law will not be expanded. In fact, there is still a lot of knowledge to be proficient in.
I hope I can help you and adopt it.