Ral is twice as old as Suri. In 3 years, Suri's current age will be 16. What is Ral's current age?
If Suri will be 16 in 3 years, that means she is 16 - 3 = 
<gadget id="calculator">16-3</gadget>
<output>13</output>
13 years old now.
Rai is twice as old as Suri, so she is 2 * 13 = 
<gadget id="calculator">2*13</gadget>
<output>26</output>
26 years old now.

<result>26</result>