The school choir should be arranged in three squares when performing, each square has 3 rows, and each row has 30 people. How many people are there in the school choir?
学校合唱团在演出时要排成三个方阵，每个方阵有3排，每排有30人．学校合唱团一共有多少人？
<gadget id="calculator">30 * 3 * 3</gadget>
<output>270</output>

<result>270</result>