The school carries out extracurricular activities. There are 28 students participating in the dance team, and 2.5 times the number of students participating in the chorus team. How many students participate in the dance team and chorus team?
学校开展课外活动，参加舞蹈队的同学有28人，参加合唱队的人数是舞蹈队的2.5倍，参加舞蹈队和合唱队的同学共有多少人？
<gadget id="calculator">28 * 2.5</gadget>
<output>70</output>

<gadget id="calculator">70 + 28</gadget>
<output>98</output>

<result>98</result>