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

### Instruction:
Ben's new car cost twice as much as his old car. He sold his old car for $1800 and used that to pay off some of the cost of his new car. He still owes another $2000 on his new car. How much did his old car cost, in dollars?

### Response:
 Gari lake jipya lina gharama ya 1800+2000=<<1800+2000=3800>>3800 dola.
Gari lake la zamani liligharimu 3800/2=<<3800/2=1900>>1900 dola.