Two ships depart from Wuhan (A) and Shanghai (B) respectively at the same time. After meeting for 23.5 hours, A travels 23 kilometers per hour, and B travels 20 kilometers per hour. How far is it from Wuhan to Shanghai?
两艘轮船分别从武汉(甲)、上海(乙)同时相对开出，经过23.5小时相遇，甲每小时行23千米，乙每小时行20千米．问武汉到上海相距多远？
<gadget id="calculator">23 + 20</gadget>
<output>43</output>

<gadget id="calculator">43 * 23.5</gadget>
<output>1_010.5</output>

<result>1_010.5</result>