There are 13 people in the school art team, 2 of them are sixth graders, 4 are fifth graders, 5 are fourth graders, and 2 are third graders. Now select 4 people to participate in the art performance, and ask each grade to choose 1 person. How many different options are there?
学校文艺队一共有13人，其中2人是六年级同学，4人是五年级同学，5人是四年级同学，2人是三年级同学．现在从中选出4人参加文艺汇演，要求每个年级选1人．共有多少种不同的选法？
<gadget id="calculator">2 * 4 * 5 * 2</gadget>
<output>80</output>

<result>80</result>