The difference between (5/6) minus (1/3) multiplied by a number is equal to (4/7). What is this number?
(5/6)减(1/3)的差乘一个数，等于(4/7)，这个数是多少？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">(5/6) - (1/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/7) / (1/2)</gadget>
<output>8/7 = around 1.142857</output>

<result>8/7 = around 1.142857</result>