2966,2975,2970,有其他答案嗎?

假設問題也要求K的千位百位相同
窮舉法得答案如下：

M = 1388, N=1397, K=1320
M = 1478, N=1496, K=1440
M = 1568, N=1595, K=1512
M = 1577, N=1586, K=1540
M = 1758, N=1794, K=1728
M = 1767, N=1785, K=1782
M = 1866, N=1875, K=1800
M = 1957, N=1984, K=1936
M = 1966, N=1975, K=1980
M = 2578, N=2596, K=2520
M = 2677, N=2686, K=2640
M = 2858, N=2894, K=2880
M = 2957, N=2984, K=2904
M = 2966, N=2975, K=2970
M = 3858, N=3894, K=3840
M = 3966, N=3975, K=3960
M = 4858, N=4894, K=4800
M = 4966, N=4975, K=4950
M = 5588, N=5597, K=5544
M = 5966, N=5975, K=5940
M = 6966, N=6975, K=6930
M = 7678, N=7696, K=7680
M = 7768, N=7795, K=7776
M = 7966, N=7975, K=7920
M = 8678, N=8696, K=8640
M = 8768, N=8795, K=8748
M = 8966, N=8975, K=8910
M = 9678, N=9696, K=9600
M = 9768, N=9795, K=9720
M = 9966, N=9975, K=9900

如K的千位百位不必相同，則答案太多了。