Johnny bought 15 packs, and every normal pack has 1 red pencil.

He should have 15 * 1 = <<15*1=15>>15 red pencils.

3 of the packs have 2 extra red colored pencils, so there are 3 * 2 = <<3*2=6>>6 extra red pencils.

In total, Johnny has 15 + 6 = <<15+6=21>>21 red colored pencils.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
21
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?
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