(9) Place 3 identical white balls, 4 identical red balls, and 5 identical yellow balls into 3 different boxes, allowing some boxes to contain balls of different colors. The total number of different ways to do this is $\qquad$ (answer in numbers).
(9) 3150 Hint: $\mathrm{C}_{5}^{2} \cdot \mathrm{C}_{6}^{2} \cdot \mathrm{C}_{7}^{2}=3150$.