Two passenger trains, A and B, start opposite each other and meet at a distance of 30 kilometers from the midpoint after 5 hours. The express train travels 60 kilometers per hour, how many kilometers per hour does the slow train travel?
甲、乙两列客车从两地相对开出，5小时后在距中点30千米处相遇，快车每小时行60千米，慢车每小时行多少千米？
<gadget id="calculator">60 * 5</gadget>
<output>300</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">300 - 60</gadget>
<output>240</output>

<gadget id="calculator">240 / 5</gadget>
<output>48</output>

<result>48</result>