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

### Instruction:
The pirates plan to explore 4 islands. Two islands require walking 20 miles per day while the other two islands require 25 miles per day. How many miles will they have to walk if it takes 1.5 days to explore each island?

### Response:
 Visiwa viwili vitachunguzwa kwa kutembea maili 20 x 2 = <<20*2=40>>40 kwa siku.
Visiwa vingine viwili vitachunguzwa kwa kutembea maili 25 x 2 = <<25*2=50>>50 kwa siku.
Hivyo, maharamia watakwenda kwa jumla ya 40 maili + 50 maili = <<40+50=90>>90 maili kwa siku kwa siku 1.5.
Hivyo, watakwenda kwa jumla ya 90 maili x 1.5 siku = <<90*1.5=135>>135 maili kwa jumla.