(1/4)*(6-(6/7))/(3/7).
(1/4)*(6-(6/7))/(3/7)．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">6 - (6/7)</gadget>
<output>36/7 = around 5.142857</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(36/7) / (3/7)</gadget>
<output>12</output>

<gadget id="calculator">(1/4) * 12</gadget>
<output>3</output>

<result>3</result>