A car is driving from City A to City B. After 3 hours, it stops due to an accident for half an hour. The driver has to accelerate 4.5 kilometers per hour. After another 4 hours to arrive at B on time, what is the distance between A and B?
一部汽车由甲城开往乙城，3小时后因事故停了半小时之后，司机每小时都要加速4.5千米．再经过4小时准时到达乙地，甲乙两城之间的距离是多少？
<gadget id="calculator">4.5 * 4</gadget>
<output>18</output>

<gadget id="calculator">18 / 0.5</gadget>
<output>36</output>

<gadget id="calculator">4 - 0.5</gadget>
<output>3.5</output>

<gadget id="calculator">3 + 3.5</gadget>
<output>6.5</output>

<gadget id="calculator">36 * 6.5</gadget>
<output>234</output>

<result>234</result>