What is the difference between the product of (4/7) and (1/2) minus (3/14)?
(4/7)与(1/2)的积减去(3/14)，差是多少？
<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>2/7 = around 0.285714</output>

<gadget id="calculator">3 / 14</gadget>
<output>3/14 = around 0.214286</output>

<gadget id="calculator">(2/7) - (3/14)</gadget>
<output>1/14 = around 0.071429</output>

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