(4/5) of a number is (16/7), what is this number.
一个数的(4/5)是(16/7)，这个数是多少．
<gadget id="calculator">16 / 7</gadget>
<output>16/7 = around 2.285714</output>

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

<gadget id="calculator">(16/7) / (4/5)</gadget>
<output>20/7 = around 2.857143</output>

<result>20/7 = around 2.857143</result>