My undeniable proof that 6 x 9 = 42

You must first understand, that 6 x 9 = 42 when you are talking base 13.
For this example, we are using the following numberset: 0123456789ABC (13 digits).

1   2   3   4   5   6   7   8   9
A   B   C   10  11  12  13  14  15
16  17  18  19  1A  1B  1C  20  21
22  23  24  25  26  27  28  29  2A
2B  2C  30  31  32  33  34  35  36
37  38  39  3A  3B  3C  40  41  42

The above table shows a 6x9 grid, with incrementing base 13 numbers in each box.
Or you could simply say: 42 base 13 is (in base 10) 4 x 13 + 2 = 54 = 6 x 9.
(Technically, it is (4 x 13^1) + (2 x 13^0); as you times each digit by the base^position)

Anyway, this is undeniable proof that 6 x 9 = 42

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