(3/5):(6/7)=X:(5/4).
(3/5)：(6/7)=X：(5/4)．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">(5/4) / (6/7)</gadget>
<output>35/24 = around 1.458333</output>

<gadget id="calculator">(3/5) * (35/24)</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>