The passenger car traveled 270 kilometers in 3 hours, and the jeep traveled 140 kilometers in 2 hours. How much more miles per hour does the passenger car travel than the jeep?
小客车3小时行驶了270千米，吉普车2小时行驶了140千米．小客车比吉普车每小时多行驶多少千米？
<gadget id="calculator">270 / 3</gadget>
<output>90</output>

<gadget id="calculator">140 / 2</gadget>
<output>70</output>

<gadget id="calculator">90 - 70</gadget>
<output>20</output>

<result>20</result>