The students in the sports meeting rehearse group gymnastics. There are 4 square formations, each with 128 people. How many people are there in total?
运动会同学们排练团体操，共有4个方阵，每个方阵128人，一共有多少人？
<gadget id="calculator">128 * 4</gadget>
<output>512</output>

<result>512</result>