Calculation: (3/4)/(((4/5)+(1/4))*(3/7))=how much.
计算：(3/4)/(((4/5)+(1/4))*(3/7))=多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

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

<gadget id="calculator">(4/5) + (1/4)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(21/20) * (3/7)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(3/4) / (9/20)</gadget>
<output>5/3 = around 1.666667</output>

<result>5/3 = around 1.666667</result>