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

### Instruction:
If farmer Steven can use his tractor to plow up to 10 acres of farmland per day, or use the same tractor to mow up to 12 acres of grassland per day, how long would it take him to plow his 55 acres of farmland and mow his 30 acres of grassland?

### Response:
 Kwa kasi ya ekari 10 kwa siku, anaweza kulima ekari 55 za shamba lake katika siku 55/10 = 5.5.
Kwa kasi ya ekari 12 kwa siku, anaweza kukata ekari 30 za nyasi katika siku 30/12 = 2.5.
Jumla yake, itamchukua siku 5.5 + siku 2.5 = <<5.5+2.5=8>>8 siku kukamilisha kulima na kukata nyasi zake.