63 x 2
You can't list "all the multiples" of any number; there are infinitely many. To calculate the multiples of 126, just calculate: 126 x 0 126 x 1 126 x 2 etc., also: 126 x (-1) 126 x (-2) etc.
The multiples of 9, 14 and 21 are infinite, starting with: 126, 252, 378, 504, 630, 756, 882 +126 . . .
All multiples of 126, which is an infinite number.
They are: 2*3*3*7 = 126
18 times 7 = 126
126, 252, 378, 504, 630, 756, 882 . . .
7 x 18 = 126 126 is a common multiple of 7 and 18
42 84 126
42, 84, 126 and so on.
It is: 126
Any multiple of 126.
The first three multiples of 42 are 42, 84 and 126.