<gadget id="calculator">154 - 9</gadget>
<output>145</output>

<result>145</result>
Edward had 9 blackberry. Rene offered him some more. Now Edward has 154 blackberry. How many did Rene offer him?
Edward had 9 blackberry. Rene offered him some more. Now Edward has 154 blackberry. How many did Rene offer him?