27
111
112
113
121
122
123
131
132
133
211
212
213
221
222
223
231
232
233
311
312
313
321
322
323
331
332
333
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32C3 = 4960
9,752 9,725 9,572
-4309278
9*9*9 = 729 using the digits 1 to 9 and 2*9 using 10 and another digit. 749 in all.
about 13