Divide a fraction, use 2 to divide twice, use 3 to divide once, get (6/7). What is the original score?
把一个分数约分，用2约分了2次，用3约分了一次，得(6/7)．原来这个分数是多少？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>