48.3 x 10 x 10 x 10 x 10 = 483 x 10 x 10 x 10 = 483 x 1000 = 483000
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When you multiply by ten to a power, move the decimal point to the right by the number of places of the power. 3.6 x 10 ^4 move decimal 4 places to right = 36000
4 of them.
Well, darling, when you multiply numbers with the same base, you just add their exponents. So, 10 to the 3rd power times 10 to the 4th power is 10 to the 7th power. Math doesn't have to be a drag, honey!
Well, darling, 4 times 10 to the 4th power is 40,000. It's as simple as that. Math doesn't have to be a drama, just multiply the 4 by the number of zeroes in 10 to the 4th power, and voila, you've got your answer.
4 000 000 000 000 + 8.0 x 10 ^18so:8,000,004,000,000,000,000