A batch of parts, all (3/10) were completed on the first day, exactly 900 pieces, all (1/6) were completed on the second day, how many parts were completed on the second day?
一批零件，第一天完成了全部的(3/10)，正好900个，第二天完成了全部的(1/6)，第二天完成了多少个零件？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">900 / (3/10)</gadget>
<output>3_000</output>

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

<gadget id="calculator">3_000 * (1/6)</gadget>
<output>500</output>

<result>500</result>