Herbert is 10 years younger than Kris. If Kris is 24 years old now, how old will Herbert be next year?
Herbert is 24 - 10 = 
<gadget id="calculator">24-10</gadget>
<output>14</output>
14 years old now.
Thus, Herbert will be 14 + 1 = 
<gadget id="calculator">14+1</gadget>
<output>15</output>
15 years old next year.

<result>15</result>