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?
It takes 12 + 9 =
<gadget id="calculator">12+9</gadget>
<output>21</output>
21 minutes to bake each cake.
It takes 21 + 6 = 
<gadget id="calculator">21+6</gadget>
<output>27</output>
27 minutes to cool and decorate each cake.
Therefore, it takes a total of 12 + 21 + 27 = 
<gadget id="calculator">12+21+27</gadget>
<output>60</output>
60 minutes to make one cake.
Thus, it takes 60/60 = 
<gadget id="calculator">60/60</gadget>
<output>1</output>
1 hour to bake one cake.
So, it will take 1 x 6 = 
<gadget id="calculator">6</gadget>
<output>6</output>
6 hours to bake all 6 cakes.

<result>6</result>