The school organized the third-grade students to visit the Shanghai World Expo Park, rented 6 buses, and stipulated that each bus can accommodate 50 people. After all the students got on the bus, the teacher found that there were still 3 empty seats in each car. How many students went to visit the Shanghai World Expo site?
学校组织三年级同学参观上海世博园区，租了6辆客车，规定每辆客车乘坐50人．等同学们全部上车后，老师发现每辆车还有3个空座位，一共有多少同学去参观上海世博园区？
<gadget id="calculator">50 - 3</gadget>
<output>47</output>

<gadget id="calculator">47 * 6</gadget>
<output>282</output>

<result>282</result>