Ali turned 8 years old this year, and is now 3 years older than Yusaf. If Umar is twice Yusaf’s age, how old is Umar?
If Ali is 3 years older, then Yusaf must be 8 - 3 = 5 years old.
Umar is twice Yusaf's age, so he must be 5 * 2 = 
<gadget id="calculator">2*5</gadget>
<output>10</output>
10 years old.

<result>10</result>