Diane is twice as old as her brother, Will. If Will was 4 years old 3 years ago, what will the sum of their ages be in 5 years?
Since Will was 4 years old 3 years ago, then he is 4+3 = 
<gadget id="calculator">4+3</gadget>
<output>7</output>
7 years old now.
Dina is twice as old as he is so she is 2*7 = 
<gadget id="calculator">2*7</gadget>
<output>14</output>
14 years old now.
In 5 years, Will will be 7+5 = 
<gadget id="calculator">7+5</gadget>
<output>12</output>
12 years old.
In 5 years, Diane will be 14+5 = 19 years old.
The sum of their ages at that time will be 12+19 = 
<gadget id="calculator">12+19</gadget>
<output>31</output>
31 years.

<result>31</result>