Mark is 7 years older than Amy, who is 15. How old will Mark be in 5 years?
Mark is 15 years + 7 years = 
<gadget id="calculator">15+7</gadget>
<output>22</output>
22 years old.
In 5 years, he will be 22 years + 5 years = 
<gadget id="calculator">22+5</gadget>
<output>27</output>
27 years old.

<result>27</result>