The number of Christmas presents David found was twice as many as the number of birthday presents. If David found a total of 60 Christmas presents, how many presents did he get all together?
The number of birthday presents that David found is 60/2 = 
<gadget id="calculator">60/2</gadget>
<output>30</output>
30.
For his birthday and Christmas, David found a total of 30+60 = 
<gadget id="calculator">30+60</gadget>
<output>90</output>
90 presents.

<result>90</result>