Mark just got a new puppy that cost $10. He also bought enough food for 3 weeks. He knows the puppy eats 1/3 cup of food a day. A bag of food with 3.5 cups costs $2. How much did all of this cost him?
He needs food for 21 days because 3 x 7 = 
<gadget id="calculator">3*7</gadget>
<output>21</output>
21.
The puppy will eat 7 cups of food because 21 x (1/3) = 
<gadget id="calculator">21*(1/3)</gadget>
<output>7</output>
7.
He needs 2 bags of food because 7 / 3.5 = 
<gadget id="calculator">7/3.5</gadget>
<output>2</output>
2.
The food will cost him $4 because 2 x 2 = 
<gadget id="calculator">2*2</gadget>
<output>4</output>
4.
It will cost $14 in total because 10 + 4 = 
<gadget id="calculator">10+4</gadget>
<output>14</output>
14.

<result>14</result>