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

### Instruction:
 Daria anapata pesa kwa ajili ya kununua kifaa cha kusafishia nyumba. Mpaka sasa, amekusanya $20 katika kibanda chake cha akiba na ameamua kuweka $10 kila wiki. Ikiwa kifaa cha kusafishia nyumba kinagharimu $120, itamchukua wiki ngapi kukusanya pesa za kutosha kufidia gharama hii?


### Response:
 Kifaa cha kusafishia nyumba kinagharimu $120, hivyo Daria anahitaji $120 - $20 = $<<120-20=100>>100 zaidi.
Daria atahitaji wiki 100 / 10 = <<100/10=10>>10 zaidi, ili aweze kununua kifaa cha kusafishia nyumba.