There are 600 parts in a batch, all (3/10) are completed on the first day, and more (1/6) are completed on the second day than the first day. How many parts were completed in two days?
一批零件有600个，第一天完成了全部的(3/10)，第二天比第一天多完成(1/6)．两天一共完成了多少个零件？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">600 * (3/10)</gadget>
<output>180</output>

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

<gadget id="calculator">1 + (1/6)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">180 * (7/6)</gadget>
<output>210</output>

<gadget id="calculator">180 + 210</gadget>
<output>390</output>

<result>390</result>