12. Teacher Li brought a stack of art paper, which was just enough to be evenly distributed among 24 students. Later, 8 more students came, so each person received 2 fewer sheets than originally. How many sheets of art paper did Teacher Li bring in total?
【Analysis】 $(24 \times 2) \div 8=6$ (sheets), $6 \times(24+8)=192$ (sheets).