<gadget id="calculator">129 + 151</gadget>
<output>280</output>

<result>280</result>
Sylvia has 151 Marbles. Justine gave him 129 more. How many Marbles does Sylvia have all together?
Sylvia has 151 Marbles. Justine gave him 129 more. How many Marbles does Sylvia have all together?