5*(6.8-(1.6+3.6/0.9))/84.
5*(6.8-(1.6+3.6/0.9))/84．
<gadget id="calculator">3.6 / 0.9</gadget>
<output>4</output>

<gadget id="calculator">1.6 + 4</gadget>
<output>5.6</output>

<gadget id="calculator">6.8 - 5.6</gadget>
<output>1.2</output>

<gadget id="calculator">1.2 / 84</gadget>
<output>0.014286</output>

<gadget id="calculator">5 * 0.014286</gadget>
<output>0.07143</output>

<result>0.07143</result>