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

### Instruction:
Nancy can hula hoop for 10 minutes.  Casey can hula hoop 3 minutes less than Nancy.  Morgan can hula hoop three times as long as Casey.  How long can Morgan hula hoop?

### Response:
 Nancy anacheza hula hoop kwa dakika 10.
Casey anacheza hula hoop kwa dakika 10-3=<<10-3=7>>7.
Morgan anacheza hula hoop kwa dakika 7*3=<<7*3=21>>21.