Nine septillion =
(9 x 1024) + (0 x 1023) + (0 x 1022) + (0 x 1021) + (0 x 1020) + (0 x 1019) + (0 x 1018) + (0 x 1017) + (0 x 1016) + (0 x 1015) + (0 x 1014) + (0 x 1013) + (0 x 1012) + (0 x 1011) + (0 x 1010) + (0 x 109) + (0 x 108) + (0 x 107) + (0 x 106) + (0 x 105) + (0 x 104) + (0 x 103) + (0 x 102) + (0 x 101) + (0 x 100)
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.9 = 0 + (9/10)
It is 9000000000.
69.409 = 60 + 9 + 0.4 + 0.009 in expanded form
Expressed in expanded form, 4069 is equal to 4000 + 60 + 9.
9 + 0.09 + 0.009