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

### Instruction:
Jason is mixing a batch of black paint. He needs to add 2 grams of charcoal for every 30 ml of water. If he adds 900 ml of water, how much charcoal does he add?

### Response:
 Kwanza tafuta ni mililita ngapi za maji Jason anahitaji kwa gramu 1 ya makaa ya mawe: 30 ml / 2 gramu = <<30/2=15>>15 ml/g
Kisha gawanya idadi ya mililita za maji Jason anatumia na kiasi cha maji kwa gramu moja ya makaa ya mawe ili kupata kiasi cha makaa ya mawe anayotumia: 900 ml / 15 ml/g = <<900/15=60>>60 g