 
 <prompt> ```The capacity of Karson house library na 400 books. If e get 120 books now, how many more books e go buy make im library full reach 90%?``` <response>: ```Wen e don reach 90% full, Karson library dey hold 90/100*400 = 360 books.
If e get 120 books for library now, e go need buy 360-120 = 240 books make hin library 90% full.

Answer na 240.``` 