The pass rate of an electronic product is 90%. If a batch of 2000 is produced, how many unqualified products are there?
一种电子产品合格率为90%，如果生产一批2000只，不合格产品有多少只？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">2_000 * (1/10)</gadget>
<output>200</output>

<result>200</result>