(1+1.23+2.34)*(8.36+7.21)-(1+8.36+7.21)*(1.23+2.34)
(1+1.23+2.34)*(8.36+7.21)-(1+8.36+7.21)*(1.23+2.34)
<gadget id="calculator">8.36 + 7.21</gadget>
<output>15.57</output>

<gadget id="calculator">1.2 + 1.23 + 1.234</gadget>
<output>3.664</output>

<gadget id="calculator">15.57 - 3.664</gadget>
<output>11.906</output>

<result>11.906</result>