The school allocates dormitories for freshmen. If there are 3 people in each room, there will be 23 more people; if there are 5 people in each room, there will be 3 rooms left. How many rooms are there in the dormitory?
学校为新生分配宿舍，每个房间住3人，则多出23人；每个房间住5人，则余下3个房间，问宿舍有多少间．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">23 + 15</gadget>
<output>38</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">38 / 2</gadget>
<output>19</output>

<result>19</result>