The two cars go to Shenzhen together, and they will run 270 kilometers. The truck took three hours and the car took 2.5 hours. How much slower is the truck than the car?
两车一起去深圳，要跑270千米．货车用了三小时，小轿车用了2.5小时，货车的速度比小轿车的速度慢多少？
<gadget id="calculator">270 / 2.5</gadget>
<output>108</output>

<gadget id="calculator">270 / 3</gadget>
<output>90</output>

<gadget id="calculator">108 - 90</gadget>
<output>18</output>

<result>18</result>