(4/7)*6/(4/7)*6=how much
(4/7)*6/(4/7)*6=多少
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">6 / (4/7)</gadget>
<output>21/2 = around 10.5</output>

<gadget id="calculator">(4/7) * (21/2) * 6</gadget>
<output>36</output>

<result>36</result>