After 9 days, Brenda bakes 20 * 9 = <<20*9=180>>180 cakes.

After she sells half of them, the remaining will be 180 / 2 = <<180/2=90>>90 cakes.

# Answer

90
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Brenda bakes 20 cakes a day. She does this for 9 days and then sells half of the cakes. How many cakes are left with Brenda?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
90
Brenda bakes 20 cakes a day. She does this for 9 days and then sells half of the cakes. How many cakes are left with Brenda?
train