Pharaoh rides a bicycle from City A to City B to run errands. He rides 15 kilometers per hour. When he comes back, he rides a motorcycle and rides 33 kilometers per hour. Riding a motorcycle takes 1.8 hours less than riding a bicycle. Find the distance between cities A and B. distance.
老王从甲城骑自行车到乙城去办事，每小时骑15千米，回来时改骑摩托车，每小时骑33千米，骑摩托车比骑自行车少用1.8小时，求甲、乙两城间的距离．
<gadget id="calculator">15 * 1.8</gadget>
<output>27</output>

<gadget id="calculator">30 - 15</gadget>
<output>15</output>

<gadget id="calculator">27 / 15</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">30 * (9/5)</gadget>
<output>54</output>

<result>54</result>