Lavinia’s daughter is 10 years younger than Katie’s daughter. Lavinia’s son is 2 times the age of Katie’s daughter. If Katie’s daughter is 12 years old, how many years older is Lavinia’s son than Lavinia’s daughter?
Lavinia's daughter is 12 - 10 = 
<gadget id="calculator">12-10</gadget>
<output>2</output>
2 years old.
Lavinia's son is 12 * 2 = 
<gadget id="calculator">12*2</gadget>
<output>24</output>
24 years old.
Lavinia's son is 24 - 2 = 
<gadget id="calculator">24-2</gadget>
<output>22</output>
22 years older than Lavinia's daughter.

<result>22</result>