Evaluate Using Scientific Notation (810^7)/(210^5)

$\frac{8 \cdot 10^{7}}{2 \cdot 10^{5}}$

Divide using scientific notation.

Group coefficients together and exponents together to divide numbers in scientific notation.

$(\frac{8}{2}) (\frac{10^{7}}{10^{5}})$

Divide $8$ by $2$ .

$4 \frac{10^{7}}{10^{5}}$

Subtract the exponent from the denominator from the exponent of the numerator for the same base

$4 \cdot 10^{7 + 5 \cdot - 1}$

Multiply $5$ by $- 1$ .

$4 \cdot 10^{7 - 5}$

Subtract $5$ from $7$ .

$4 \cdot 10^{2}$

Convert $4 \cdot 10^{2}$ from scientific notation.

$400$

Evaluate Using Scientific Notation (8*10^7)/(2*10^5)