(2/3)/(4/5)*(5/7)=how much.
(2/3)/(4/5)*(5/7)=多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(2/3) / (4/5)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(5/6) * (5/7)</gadget>
<output>25/42 = around 0.595238</output>

<result>25/42 = around 0.595238</result>