Xiaojun rides a motorcycle from Shilin to Changhu. After walking for 1.5 hours, there is still 2.3 kilometers left. The motorcycle travels 20 kilometers per hour. Ask: How many kilometers is the distance between Shilin and Changhu?
小军骑摩托车从石林到长湖，走了1.5小时后还剩2.3千米，摩托车每小时走20千米，问：石林到长湖相距多少千米？
<gadget id="calculator">20 * 1.5</gadget>
<output>30</output>

<gadget id="calculator">30 + 2.3</gadget>
<output>32.3</output>

<result>32.3</result>