General Numbers
Any number can be expressed as a product of a number between 1 and 10 and a power of 10.
400,000 = 4 x 100,000 = 4. x 105
430,000 = 430,000 x 100 = 4.3 x 100,000 = 4.3 x 105
(In both cases, decimal moved 5 places to left)
0.007 = 7 x 0.001 = 7. x 10-3 (3 places to the right)
0.00000558 = 0.00000558 x 100 = 5.58 x 10-6
(moved 6 places to the right)