Nadine collected different colored pebbles. She has 20 white pebbles and half as many red pebbles. How many pebbles does she have in all?
Nadine has 20/2 = 
<gadget id="calculator">20/2</gadget>
<output>10</output>
10 red pebbles.
Thus, she has 20 + 10 = 
<gadget id="calculator">20+10</gadget>
<output>30</output>
30 pebbles.

<result>30</result>