The whole class stands in a team, and Xiao Ming is the 23rd from the front, and he is also the 23rd from the back, so how many students are there in the class?
全班同学站成一队，从前数小明是第23名，从后数他也是第23名，那么全班一共有多少名同学．
<gadget id="calculator">23 - 1</gadget>
<output>22</output>

<gadget id="calculator">23 + 22</gadget>
<output>45</output>

<result>45</result>