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

### Instruction:
In India, it cost $1 to purify a gallon of fresh water. Each person needs 1/2 a gallon of fresh water a day. In a family of 6, how much will it cost for fresh water for the day?

### Response:
 Watu 6 wanahitaji 6 x 1/2 = <<6*1/2=3>>3 galoni za maji.
Inagharimu $1 x 3 = $<<1*3=3>>3 kusafisha maji.