There are 48 people in class 5 and 1 lined up in two columns on average, and the distance between the front and back is 1 meter. How long is this line?
五1班有48人平均排成两路纵队，前后两人间隔1米，这列队伍有多长？
<gadget id="calculator">48 / 2</gadget>
<output>24</output>

<gadget id="calculator">24 - 1</gadget>
<output>23</output>

<gadget id="calculator">23 * 1</gadget>
<output>23</output>

<result>23</result>