The sporting goods factory plans to produce 5,000 balls, and 500 balls are produced every day. It has been produced for 4 days. How many more days will it be? (calculated in two ways)
体育用品厂计划生产5000只皮球，每天生产500只，已经生产了4天，还要生产多少天？(用两种方法计算)
<gadget id="calculator">500 * 4</gadget>
<output>2_000</output>

<gadget id="calculator">5_000 - 2_000</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 / 500</gadget>
<output>6</output>

<result>6</result>