The school organizes middle and senior students to go to the movies. There were 97 people in the middle grades, and twice as many people in the upper grades as in the middle grades. How many people went to the middle and upper grades?
学校组织中、高年级学生去看电影．中年级去了97人，高年级去的人数是中年级的2倍，中、高年级一共去了多少人？
<gadget id="calculator">97 * 2</gadget>
<output>194</output>

<gadget id="calculator">194 + 97</gadget>
<output>291</output>

<result>291</result>