A batch of books sold 2,500 copies, leaving (1/6), how many books are there in total?
一批书卖出2500本，剩下(1/6)，这批书一共多少本？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2_500 / (5/6)</gadget>
<output>3_000</output>

<result>3_000</result>