20/(4.3*2+5.7*2)
20/(4.3*2+5.7*2)
<gadget id="calculator">4.3 * 2</gadget>
<output>8.6</output>

<gadget id="calculator">5.7 * 2</gadget>
<output>11.4</output>

<gadget id="calculator">8.6 + 11.4</gadget>
<output>20</output>

<gadget id="calculator">20 / 20</gadget>
<output>1</output>

<result>1</result>