Four $5 bills amount to $5 x 4 = $<<5*4=20>>20.

Three $20 bills amount to $20 x 3 = $<<20*3=60>>60.

So Gail's $5 and $20 bills amount to $20 + $60 = $80.

Thus, her $10 bills amount to $100 - $80 = $20.

Therefore, she has $20/$10 = <<20/10=2>>2 $10 bills.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Gail has some bills in her wallet which amount to $100. She has four $5 bills and three $20 bills, and the rest are $10 bills. How many $10 bills are in her wallet?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2
Gail has some bills in her wallet which amount to $100. She has four $5 bills and three $20 bills, and the rest are $10 bills. How many $10 bills are in her wallet?
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