Help I need to know how to do this

Step-by-step explanation:

Add the diameters of Earth and Mars together and then compare the result to that of Jupiter:

Jupiter's diameter of is much larger than the combined diameters of the Earth and Mars by more than a factor of 7.

10⁹ + 10⁸ + 10⁷ = 10⁷ (10² + 10¹ + 10⁰)

… = 10⁷ (100 + 10 + 1)

… = 10⁷ × 111

… = (2 × 5)⁷ × 111

… = 2⁷ × 5⁷ × 111

… = 2⁷ × 5⁶ × 555