This is the box method you can use the box method in times X e.g (16X12) and divided by. You draw a box then you divide the number into the easiest numbers to work with.
I find the box method quite challenging because I just learnt it and it is very confusing, you don't know what numbers to split and what numbers to put in the box.
Feeedback\Feedforward: I noticed you have trouble with the box method. To get better at using the box method you could practice it at home or with your independent math.