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

### Instruction:
The building has 42 storage units that are a total of 5040 square feet. Twenty of the units are 8 by 4 feet each. If the remaining units are all the same size, what is the area, in square feet, for one of the remaining units?

### Response:
 8 * 4 = <<8*4=32>>32 futi za mraba
20 * 32 = <<20*32=640>>640 futi za mraba
5040 - 640 = <<5040-640=4400>>4400 futi za mraba
Kuna vyumba 42 - 20 = <<42-20=22>>22 vilivyobaki
4400/22 = <<4400/22=200>>200 futi za mraba
Kimoja cha vyumba vilivyobaki ni futi za mraba 200.