Master Wang processes a batch of parts. When the statistician inquires about the processing situation, Master Wang replies that the completed quantity is not completed (2/5), and the 300 pieces that have just completed the task (1/3) are being produced. Ask Wang How many parts has been processed by the master
王师傅加工一批零件，当统计员询问加工情况时，王师傅回答说，已经完成的数量是没完成的(2/5)，在生产300个正好完成任务的(1/3)，问王师傅已经加工了多少个零件多少个
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(1/3) - (2/7)</gadget>
<output>1/21 = around 0.047619</output>

<gadget id="calculator">300 / (1/21)</gadget>
<output>6_300</output>

<gadget id="calculator">6_300 * (2/7)</gadget>
<output>1_800</output>

<result>1_800</result>