There are 600 parts in a batch, all (3/10) are completed on the first day, and all (5/12) are completed on the second day, how many more parts are completed on the second day than on the first day?
一批零件有600个，第一天完成了全部的(3/10)，第二天完成了全部的(5/12)，第二天比第一天多完成多少个零件？
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(5/12) - (3/10)</gadget>
<output>7/60 = around 0.116667</output>

<gadget id="calculator">600 * (7/60)</gadget>
<output>70</output>

<result>70</result>