2x:3=1:5.
2x：3=1：5．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 3</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 2</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>