If you have a large number to multiply and one of the numbers is even, you can easily subdivide to get to the answer:
So if we take 32 x 125
we can see that it is the same as:
16 x 250
which is the same as
8 x 500 which is the same as
4 x 1000, a nice easy sum for you to approach with confidence.
So 32 x 125 = 4,000