A passenger car travels 45 kilometers per hour, which is 1.8 kilometers less than 3.6 times that of a bicycle per hour. How much does the bicycle travel per hour?
客车每小时行45千米，比自行车每小时行的3.6倍少1.8千米，自行车每小时行多少．
<gadget id="calculator">1.8 + 45</gadget>
<output>46.8</output>

<gadget id="calculator">46.8 / 3.6</gadget>
<output>13</output>

<result>13</result>