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

### Instruction:
Janina spends $30 each day for rent and uses $12 worth of supplies daily to run her pancake stand. If she sells each pancake for $2, how many pancakes must Janina sell each day to cover her expenses?

### Response:
 Janina anatumia $30+$12=$<<30+12=42>>42 kila siku kwa biashara yake ya vitumbua.
Anapaswa kuuza vitumbua $42/$2=<<42/2=21>>21 kila siku ili kufidia gharama zake.