There are 600 parts in a batch, all (3/10) are completed on the first day, and the rest (4/7) are completed on the second day, how many parts are completed on the second day?
一批零件有600个，第一天完成了全部的(3/10)，第二天完成了剩下的(4/7)，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">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">600 * (7/10) * (4/7)</gadget>
<output>240</output>

<result>240</result>