Some students move a pile of bricks. If each person moves 8 yuan, the remaining 20 yuan has not been removed. If each person moves 9 yuan, the last student only moves 6 yuan, so how many students are there in total?
若干学生搬一堆砖．若每人搬8块，则剩下20块未搬走，若每人搬9块，则最后一名学生只搬6块，那么共有学生多少人．
<gadget id="calculator">9 - 6</gadget>
<output>3</output>

<gadget id="calculator">20 + 3</gadget>
<output>23</output>

<result>23</result>