Answer
The sun is 3.51 $\times$ $10^{3}$ more massive than Saturn.
Work Step by Step
When you make the word problem into an equation you have, $\frac{1.998 * 10^3{^0}}{5.69 *10^2{^6}}$. The numerator represents the sun's mass and the denominator represents Saturn's mass:
$\frac{1.998 * 10^3{^0}}{5.69 *10^2{^6}}$ -subtract the exponents-
$10^{30-26}$=$10^{4}$
$\frac{1.998}{5.69}$ $\times$ $10^{4}$ -divide the terms-
0.351 $\times$ $10^{4}$ -change it into scientific notation form-
=3.51 $\times$ $10^{3}$
