There are 600 parts in a batch, all (3/10) are completed on the first day, and all (1/6) are completed on the second day, how many more parts are completed on the first day than on the second day?
一批零件有600个，第一天完成了全部的(3/10)，第二天完成了全部的(1/6)，第一天比第二天多完成了多少个零件？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(3/10) - (1/6)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">600 * (2/15)</gadget>
<output>80</output>

<result>80</result>