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

### Instruction:
 John ananunua spool 3 za waya ambazo kila moja ina urefu wa futi 20. Inachukua futi 4 kutengeneza mkufu. Anaweza kutengeneza mikufu mingapi?


### Response:
 Ana futi 60 za waya. Hiyo ni 60/4 = <<60/4=15>>15 mikufu.