The school organized students to visit the Science Museum. 206 students from the lower grades went there, and 30 people from the middle and upper grades were twice as many as the lower grades. How many people went to the middle and upper grades?
学校组织学生参观科学馆，低年级去了206人，中高年级去的人数比低年级的2倍还多30人．中高年级一共去了多少人？
<gadget id="calculator">206 * 2</gadget>
<output>412</output>

<gadget id="calculator">412 + 30</gadget>
<output>442</output>

<result>442</result>