1.6*(1/(2.1-2.09)).
1.6*(1/(2.1-2.09))．
<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">1.6 * 100</gadget>
<output>160</output>

<result>160</result>