It must be related to 3, and the multiple of 3 is (please look vertically):
3,24,45
6,27,48
9,30,5 1
12,33,54
15,36,57
18,39,60
2 1,42,63 ......
3 times 24 equals 72.
45 times 6 equals 270.
The product of 27 times 48 is 1296.
9 times 30 equals 270.
The product of 5 1 times 12 is 62 1.
The product of 33 times 54 is 1782.
then what = 15*36=540
Additional:
The last number is: 2 1*42=882.
The number of such standard questions is limited.
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