Solution ratio: ((4.6)/(0.2))=(8/(x)).
解比例：((4.6)/(0.2))=(8/(x))．
<gadget id="calculator">8 * 0.2</gadget>
<output>1.6</output>

<gadget id="calculator">1.6 / 4.6</gadget>
<output>0.347826</output>

<result>0.347826</result>