The quotient of (2/7) divided by (1/2), minus (4/5) of (5/8), what is the difference?
(2/7)除以(1/2)的商，减(5/8)的(4/5)，差是多少？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

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

<gadget id="calculator">(2/7) / (1/2)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(5/8) * (4/5)</gadget>
<output>1/2 = around 0.5</output>

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

<result>1/14 = around 0.071429</result>