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

### Instruction:
Johnny buys 15 packs of colored pencils for his class. Each pack has a red, yellow, and green pencil inside. When he gets home he notices that 3 of the packs have two extra red pencils inside. How many red colored pencils did Johnny buy?

### Response:
 Johnny anapaswa kuwa na penseli nyekundu 15 * 1 = <<15*1=15>>15.
Pakiti 3 zina penseli nyekundu 2 za ziada, hivyo kuna penseli nyekundu 3 * 2 = <<3*2=6>>6 za ziada.
Johnny ana jumla ya penseli nyekundu 15 + 6 = <<15+6=21>>21.