3.86*(1/(2.1-2.09))+0.6=how much.
3.86*(1/(2.1-2.09))+0.6=多少．
<gadget id="calculator">2.1 - 2.09</gadget>
<output>0.01</output>

<gadget id="calculator">1 / 0.01</gadget>
<output>100</output>

<gadget id="calculator">3.86 * 100</gadget>
<output>386</output>

<gadget id="calculator">386 + 0.6</gadget>
<output>386.6</output>

<result>386.6</result>