Process a batch of 9,000 toys and complete them in three days. The ones completed on the first day account for (5/7) of the second day, and the ones completed on the third day account for (1/3) of this batch of toys. How many toys are completed on the first day? Component?
加工一批玩具9000个，三天完成，第一天完成的是第二天的(5/7)，第三天完成的占这批玩具的(1/3)，第一天完成了多少个零件？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">9_000 * (2/3) * (5/12)</gadget>
<output>2_500</output>

<result>2_500</result>