(6/7)/(((4/7)-(1/2))*(2/5)).
(6/7)/(((4/7)-(1/2))*(2/5))．
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/7) - (1/2)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/14) * (2/5)</gadget>
<output>1/35 = around 0.028571</output>

<gadget id="calculator">(6/7) / (1/35)</gadget>
<output>30</output>

<result>30</result>