Teacher Li, Teacher Wang and Teacher Liu took 177 students to visit the museum in passenger cars. Each passenger car is limited to 45 people. How many such passenger cars can be transported at one time?
李老师、王老师和刘老师带177名学生乘客车去参观博物馆，每辆客车限乘45人，用几辆这样的客车才能一次运完？
<gadget id="calculator">177 + 3</gadget>
<output>180</output>

<gadget id="calculator">180 / 45</gadget>
<output>4</output>

<result>4</result>