Xiao Ming's school organized a visit to the Science and Technology Museum. The school used 3 cars with a capacity of 45 people to send all the students away twice. How many students visited the Science and Technology Museum at most?
小明的学校组织参观科技馆，学校用3辆准乘45人的汽车，2次才把所有的学生送走．最多有多少个同学参观了科技馆？
<gadget id="calculator">45 * 3 * 2</gadget>
<output>270</output>

<result>270</result>