The students performed group gymnastics. They were originally arranged in 27 rows, with 20 people in each row. After the formation changes, there are 30 rows, how many people are there in each row?
同学们表演团体操，原来排成27行，每行20人．队形变化后，排成了30行，每行有多少人？
<gadget id="calculator">540 / 30</gadget>
<output>18</output>

<result>18</result>