Shengli Primary School organized 144 teachers and students to go on a spring outing. It was planned to rent a bus for 48 people, but in reality, 18 people rented a bus for the safety of teachers and students. In this way, how many more cars did the school actually rent than the original plan?
胜利小学组织144名师生去春游，计划48人租一辆客车，实际为了师生安全考虑，改为18人租一辆客车，这样，学校实际比原计划多租了多少辆车？
<gadget id="calculator">144 / 18</gadget>
<output>8</output>

<gadget id="calculator">144 / 48</gadget>
<output>3</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<result>5</result>