A toy is 75% complete, and there are 1,500 pieces left unfinished. How many pieces are there in this batch?
一种玩具，完成了75%，还剩1500件没完成，这批玩具一共有多少件？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1_500 / (1/4)</gadget>
<output>6_000</output>

<result>6_000</result>