Master Wang processed a batch of parts, and completed 75% of the plan in the first week. If he processed another 300 parts in the second week, the task would be completed. How many parts are there in total?
王师傅加工一批零件，第一周按计划完成了75%，如果第二周再加工300个，就能完成任务，问这批零件共多少个？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">300 / (1/4)</gadget>
<output>1_200</output>

<result>1_200</result>