((4/7)-(1/2))/(15/14).
((4/7)-(1/2))/(15/14)．
<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">15 / 14</gadget>
<output>15/14 = around 1.071429</output>

<gadget id="calculator">(1/14) / (15/14)</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>