Marcus can fit 5 pies in his oven at once. He bakes 7 batches of pies, then slips and drops 8 of them. How many pies are left?
First find the total number of pies Marcus bakes: 5 pies/batch * 7 batches = 
<gadget id="calculator">5*7</gadget>
<output>35</output>
35 pies.
Then subtract the number of pies Marcus drops: 35 pies - 8 pies = 
<gadget id="calculator">35-8</gadget>
<output>27</output>
27 pies.

<result>27</result>