It takes 12 + 9 =<<12+9=21>>21 minutes to bake each cake.

It takes 21 + 6 = <<21+6=27>>27 minutes to cool and decorate each cake.

Therefore, it takes a total of 12 + 21 + 27 = <<12+21+27=60>>60 minutes to make one cake.

Thus, it takes 60/60 = <<60/60=1>>1 hour to bake one cake.

So, it will take 1 x 6 = <<6=6>>6 hours to bake all 6 cakes.

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Julia had to make 6 cakes for the party. Each cake takes 12 minutes to mix and needs 9 more minutes to bake than mix. Then it takes 6 more minutes to cool and decorate than to bake. How many hours will it take to make all 6 cakes?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
6
Julia had to make 6 cakes for the party. Each cake takes 12 minutes to mix and needs 9 more minutes to bake than mix. Then it takes 6 more minutes to cool and decorate than to bake. How many hours will it take to make all 6 cakes?
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