Robert had 25 balls. Tim gave him half of his 40 balls. How many balls does Robert have now?
Tim gave 40 / 2 = 
<gadget id="calculator">40/2</gadget>
<output>20</output>
20 balls to Robert.
Robert now has 25 + 20 = 
<gadget id="calculator">25+20</gadget>
<output>45</output>
45 balls.

<result>45</result>