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

### Instruction:
Phil likes to collect baseball cards.  He buys a pack of twenty each week for a year, but then loses half of them one day in a fire.  How many baseball cards does Phil have left?

### Response:
 Ikiwa Phil anaanza kununua kadi 20 kila wiki kwa wiki 52, mkusanyiko wake unaanza kwa kadi 20*52= <<20*52=1040>>1040.
Baada ya moto, anapoteza nusu yao kwa kadi 1040*0.5= <<1040*0.5=520>>520 zilizobaki.