(3/11) of a number is (6/7), find this number. What is the correct column
一个数的(3/11)是(6/7)，求这个数．正确的列式是多少
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">3 / 11</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">(6/7) / (3/11)</gadget>
<output>22/7 = around 3.142857</output>

<result>22/7 = around 3.142857</result>