(2/3)X/(3/4)=(10/21).
(2/3)Ⅹ/(3/4)=(10/21)．
<gadget id="calculator">10 / 21</gadget>
<output>10/21 = around 0.47619</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(10/21) * (3/4)</gadget>
<output>5/14 = around 0.357143</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(5/14) / (2/3)</gadget>
<output>15/28 = around 0.535714</output>

<result>15/28 = around 0.535714</result>