Calculation: ((3/4)-(1/4)/(7/20))/(3/14).
计算：((3/4)-(1/4)/(7/20))/(3/14)．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(1/4) / (7/20)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(3/4) - (5/7)</gadget>
<output>1/28 = around 0.035714</output>

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

<gadget id="calculator">(1/28) / (3/14)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>