Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
 Ken anaweza kufanya push-up 20 bila kusimama. Nathan anaweza kufanya mara mbili zaidi, na Bob anaweza kufanya nusu ya idadi ya push-up ya Ken na Nathan. Bob anaweza kufanya push-up ngapi zaidi kuliko Ken?


### Response:
 Nathan anaweza kufanya 2 * 20 = <<2*20=40>>40 push-up.
Idadi ya push-up ya Ken na Nathan ni 40 + 20 = <<40+20=60>>60 push-up.
Bob anaweza kufanya 60 / 2 = <<60/2=30>>30 push-up.
Bob anaweza kufanya push-up 30 - 20 = <<30-20=10>>10 zaidi kuliko Ken.