<gadget id="calculator">30 - 7</gadget>
<output>23</output>

<result>23</result>
Billy had some lime. Melvin gave him 7 more. Now Billy has 30 lime. How many lime did Billy have in the beginning?
Billy had some lime. Melvin gave him 7 more. Now Billy has 30 lime. How many lime did Billy have in the beginning?