A large truck and a small car start from the same place and drive along the same road. The large truck travels for 1.5 hours first, and the small car catches up with the large truck 4 hours after departure. If the car travels more than 5 kilometers per hour, it will catch up with the big truck 3 hours after departure. Question: How many kilometers per hour does the car actually travel?
大货车和小轿车从同一地点出发沿同一公路行驶，大货车先走1.5小时，小轿车出发后4小时后追上了大货车．如果小轿车每小时多行5千米，那么出发后3小时就追上了大货车．问：小轿车实际上每小时行多少千米？
<gadget id="calculator">8 / 11</gadget>
<output>8/11 = around 0.727273</output>

<gadget id="calculator">1 - (8/11)</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">3 / (3/11)</gadget>
<output>11</output>

<gadget id="calculator">5 * 11</gadget>
<output>55</output>

<result>55</result>