X: (2/5) = (2/3): 8.
X：(2/5)=(2/3)：8．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/3) * (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(4/15) / 8</gadget>
<output>1/30 = around 0.033333</output>

<result>1/30 = around 0.033333</result>