Two cars drive from east to west at the same time and meet each other in 5.5 hours. The speed of the fast car is 1.2 times that of the slow car. It is known that the slow car travels 45 kilometers per hour. How many kilometers are the distance between the east and the west?
两辆汽车同时从东西两地相向开出，5.5小时相遇，快车的速度是慢车的1.2倍，已知慢车每小时行驶45千米，东西两地相距多少千米？
<gadget id="calculator">45 * 1.2</gadget>
<output>54</output>

<gadget id="calculator">45 + 54</gadget>
<output>99</output>

<gadget id="calculator">99 * 5.5</gadget>
<output>544.5</output>

<result>544.5</result>