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

### Instruction:
Janet makes $20 per hour at work. She works 52 hours per week. Anything over 40 hours per week is considered overtime and is paid at 1.5 times the normal rate. She wants to purchase a $4640 car. How many weeks does she need to work to purchase the car?

### Response:
 Kila wiki anafanya kazi masaa 40 kwa kiwango chake cha kawaida cha $20 kwa saa, hivyo anapata 40 * 20 = $<<40*20=800>>800 kwa wiki kwa kiwango chake cha kawaida.
Kwa muda wa ziada, anapata $20 * 1.5 = $<<20*1.5=30>>30 kwa saa.
Kila wiki anafanya kazi masaa 52 - 40 = <<52-40=12>>12 ya muda wa ziada.
Hivyo, anapata 12 * $30 = $<<12*30=360>>360 kutoka kwa muda wa ziada kila wiki.
Jumla ya mapato yake kwa wiki ni $360 + $800 = $<<360+800=1160>>1160 kwa wiki.
Ili kufikia $4640, anahitaji kufanya kazi $4640 / $1160 = <<4640/1160=4>>4 wiki.