-1,000,000,000
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10-9 = 1/109 = 0.000000001
it is 1/100,000,000 or 1/10 to the negative 8th power.
(109) x (107) = 10(9+7) = 1016which is equal to 10,000,000,000,000,000
0.0000000000000000000000000001
This is a number written in scientific notation, which expanded would equal 4,538,000,000.