The first ten positive integer multiples of 12345678 are:
1 x 12345678 = 12345678
2 x 12345678 = 24691356
3 x 12345678 = 37037034
4 x 12345678 = 49382712
5 x 12345678 = 61728390
6 x 12345678 = 74074068
7 x 12345678 = 86419746
8 x 12345678 = 98765424
9 x 12345678 = 111111102
10 x 12345678 = 123456780
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12345678 + 12345678 = 2*12345678 = 12345678/5 *10 = 246,913,578
-the first 10 multiples of 20 are 20,40,60,80,100,120,140,160,180, and 200. :)
There are no multiples of ten.
They are 10 and 20
20,40,60,80,100,120,140,160,180,200