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

### Instruction:
A car uses 20 gallons of gas to travel 400 miles. Mr. Montero's car has 8 gallons in it. How many more gallons of gas does he need to travel 600 miles, back and forth?

### Response:
 Matumizi ya mafuta kwa kila maili ni 20/400 = <<20/400=0.05>>0.05 galoni.
Kusafiri kwenda na kurudi kutahitaji maili 600X2 = <<600*2=1200>>1200.
Bwana Montero anahitaji 1200X0.05 = <<1200*0.05=60>>60 galoni kwa jumla.
Kwa kuwa gari yake ina galoni 8 tayari, basi anahitaji kuongeza galoni 60-8 = <<60-8=52>>52 za mafuta zaidi.