170 students took 4 cars to visit the Science and Technology Museum. Each of the first 3 cars takes 45 people, how many students will the last car take?
170名学生乘坐4辆车去科技馆参观．前3辆车每辆乘坐45人，最后一辆车要坐多少名学生？
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">170 - 135</gadget>
<output>35</output>

<result>35</result>