Any number that starts "0.00010000" followed by at least one non-zero digit is bigger than 0.0001 and smaller than 0.00010001, eg:
0.000100001
0.00010000000000000000000000001
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00000 or 00001
.00001 x 3 = .00003
.00006
It is a small number. 10-45 alone is the same thing as 0.00000 00000 00000 00000 00000 00000 00000 00000 00001 The number in the question is only about twice as much as that.
138 x 00001 = 138 x 1 = 138.