Question

I need help with the work to find this answer

Answer 1

The answer is 2880.

Answer 2

So you need to find the volume which is length x width x height

to do this find the volume of the step as if it was a perfect cube (no indent)

so it is 20x16x12 = 3840

then subtract the indent from that (extra space)
so 8x20x6 = 960

3840-960=2880

2880 is the final answer