 
 <prompt> ```Lenny buy 20 boxes of pen. Each box get 5 pen. She share 40% of the pen give her close friends and one-fourth of wetin remain give her classmates. How many pen remain for Lenny?``` <response>: ```Lenny get 20 x 5 = 100 pens.
She share give her close friends 100 x 40% = 40 pens.
So, 100 - 40 = 60 pens remain.
Half of 60 na 60/4= 15 pens.
So, Lenny get 60 - 15 = 45 pens remain.

The final answer: 45.``` 