Subtract a number from the difference between (2/3) and (1/4) to get (1/6). What is this number?
从(2/3)与(1/4)的差里减去一个数得(1/6)，这个数是多少？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(2/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(5/12) - (1/6)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>