2) The relation between the number of time in days, D, it takes for a planet to revolve around the Sun is related to the planet's average distance from the Sun, k, in millions of kilometers is defined by $\displaystyle logD = \frac{3}{2}logk - 0.7.$ How much longer does it take Mars than Venus to orbit the Sun if Mars is 207 million km and Venus is 108 million km away from the Sun?

Please guyzz, try your best to solve this problem, I would really appreciate it if you guyz would help me out.

Thank You.