 
 <prompt> Henry ya tafi kashi a fannin kasa da ya samu 17 na fari da 52 na fari da suka kammala. Daga cikin su 52 na fari da suka kammala, mafi yawa daga su sun kasance spiral. Daga cikin su 17 na fari, 12 daga su ba su kasance spiral ba. Me ya faru idan aka sa ƙarfe da suka kammala fari suna daidai da fari da suka kammala da suka kasance da spiral? <response>: ```52 broken shells / 2 = 26 broken shells were spiral.
17 perfect shells - 12 not spiral perfect shells = 5 perfect shells were spiral.
There were 26 - 5 = 21 more broken spiral shells than perfect spiral shells.

The final answer: 21.``` 