A factory plans to produce a batch of toys. It completed 25% of the plan in the first week, and 30% of the plan in the second week. The first week produced 500 fewer toys than the second week. How many toys were originally planned?
某厂计划生产一批玩具，第一周完成了计划的25%，第二周完成了计划的30%，第一周比第二周少生产500个，原计划生产玩具多少个？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/10) - (1/4)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">500 / (1/20)</gadget>
<output>10_000</output>

<result>10_000</result>