The school bought 8 water dispensers and 8 packs of disposable paper cups, and paid a total of 2,000 yuan. Each water dispenser costs 200 yuan. How much is each pack of paper cups? (column equation)
学校买来8台饮水机和8包一次性纸杯，共付2000元，每台饮水机200元，每包纸杯多少元？(列方程)
<gadget id="calculator">8 * 200</gadget>
<output>1_600</output>

<gadget id="calculator">2_000 - 1_600</gadget>
<output>400</output>

<gadget id="calculator">400 / 8</gadget>
<output>50</output>

<result>50</result>