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

### Instruction:
 Bwana Dubois ananunua gari jipya kwa $13,380. Analipa $5,400 na anamalizia kwa kutoa $420 kila mwezi. Baada ya miezi mingapi gari litakuwa limekamilika kulipwa?


### Response:
 Kwanza tafuta kiasi kamili cha pesa ambacho Bwana Dubois anahitaji kulipa: 13,380 - 5,400 = <<13,380-5,400=7980>>7,980 dola.
Kisha ugawanye kiasi hiki na kiasi anacholipa kila mwezi: 7,980 dola / 420 dola/mwezi = <<7980/420=19>>19 miezi.