Marcus, Humphrey, and Darrel are bird watching. Marcus sees 7 birds, Humphrey sees 11 birds, and Darrel sees 9 birds. How many birds does each of them see on average?
They see 27 total birds because 9 +11 + 7 = 
<gadget id="calculator">9+11+7</gadget>
<output>27</output>
27.
They see an average of 9 birds each because 27 / 3 = 
<gadget id="calculator">27/3</gadget>
<output>9</output>
9.

<result>9</result>