The increase is $100 x 10/100 = $<<100*10/100=10>>10.

So you have to give $100 + $10 = $<<100+10=110>>110 to your friend today.

# Answer

110
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Last month, you borrowed $100 from your friend. If you promise to pay her today, how much will you give to your friend if both of you agreed to return the money with a 10% increase?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
110
Last month, you borrowed $100 from your friend. If you promise to pay her today, how much will you give to your friend if both of you agreed to return the money with a 10% increase?
train