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

### Instruction:
Archie needs to lay sod in his backyard that measures 20 yards by 13 yards. He has a shed on it that measures 3 yards by 5 yards. How many square yards of sod will Archie need for his backyard?

### Response:
 20 * 13 = <<20*13=260>>260 ekari za mraba
3 * 5 = <<3*5=15>>15 ekari za mraba
260 - 15 = <<260-15=245>>245 ekari za mraba
Archie anahitaji ekari 245 za nyasi.