I think lots of teachers will have multiplicand and multiplier in a particular order in their head. The multiplicand doesn’t have to come first, and the product is the same if it comes first or second.
3 x 4 = 3 lots of four = 3 + 3 + 3 + 3 = 4 x 3 = 4 three times = 4 + 4 + 4 = 12
¾ of £20 The ‘of’ gets replaced by the ‘x’ symbol, so the multiplicand comes second.
If you think of multiplication as
factor x factor = product
the order of the factors will not matter. If we want children to reason and be fluent when calculating, we really don’t want them to get hung up on the order. When we abstract and write a calculation, we want them to use an order that makes sense to them and know what each factor means in the context of the question.
Hope this helps!