From Xiaoli, Xiaojun, Xiaojie, and Xiaoyang, 2 students are selected to represent the school to participate in theatrical performances. How many different team formation plans are there?
从小丽、小军、小杰、小阳4名同学中，选出2人代表学校参加文艺演出，有多少种不同的组队方案？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 * (3/2)</gadget>
<output>6</output>

<result>6</result>