(17.1-17.1/(3.1-0.7))*0.6.
(17.1-17.1/(3.1-0.7))*0.6．
<gadget id="calculator">3.1 - 0.7</gadget>
<output>2.4</output>

<gadget id="calculator">17.1 / 2.4</gadget>
<output>7.125</output>

<gadget id="calculator">17.1 - 7.125</gadget>
<output>9.975</output>

<gadget id="calculator">9.975 * 0.6</gadget>
<output>5.985</output>

<result>5.985</result>