The students are doing radio exercises. There are 12 people standing in each row, exactly 35 rows. How many students are doing radio exercises?
同学们做广播操，每行站12人，刚好站了35行，做广播操的同学一共有多少人？
<gadget id="calculator">35 * 12</gadget>
<output>420</output>

<result>420</result>