<gadget id="calculator">157 - 20</gadget>
<output>137</output>

<result>137</result>
Tamra had 157 Mango. Bertha grabbed some Mango. Now Tamra has 20  Mango. How many did Bertha grabbeds?
Tamra had 157 Mango. Bertha grabbed some Mango. Now Tamra has 20 Mango. How many did Bertha grabbeds?