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

### Instruction:
Candice read 3 times as many books as Amanda in their school's Book Tournament. Kara read half the number of books that Amanda read, and Patricia read 7 times the number of books that Kara read. If Candice read 18 books, how many books did Patricia read?

### Response:
 Amanda alisoma vitabu 18/3=<<18/3=6>>6.
Kara alisoma vitabu 6/2=<<6/2=3>>3.
Patricia alisoma vitabu 7*3=<<7*3=21>>21.