The sum of (1/9) and (2/3) is equal to (1/3) of a number, find this number.
(1/9)与(2/3)的和与一个数的(1/3)相等，求这个数．
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/9) + (2/3)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(7/9) / (1/3)</gadget>
<output>7/3 = around 2.333333</output>

<result>7/3 = around 2.333333</result>