The van travels 144.3 kilometers at 2.6 hours, and the car travels 287.7 kilometers at 4.2 hours. Who is faster, a van or a car? How many kilometers per hour?
面包车2.6时行驶144.3千米，小轿车4.2时行驶287.7千米．面包车和小轿车谁的速度快？每时快多少千米？
<gadget id="calculator">287.7 / 4.2</gadget>
<output>68.5</output>

<gadget id="calculator">144.3 / 2.6</gadget>
<output>55.5</output>

<gadget id="calculator">68.5 - 55.5</gadget>
<output>13</output>

<result>13</result>