Solution ratio. ((x)/(2.4))=5:3.
解比例．((x)/(2.4))=5：3．
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) * 2.4</gadget>
<output>4</output>

<result>4</result>