can you please solve this problem? Please follow the steps and write it clearly. showing unit conversion ( dimensional analysis ) will be much appreciated.

_ ifind the mass of the earth in rough order of magnitude. Use these data: I g=Ger2 gravity constant G = 6.6? x 10"11 NmEKkQE circumference of the earth = 40,000 km acceleration due to gravity.f on earth g = 9.8 mg's2 Please show your work in converting each term to an order of magnitude, cancelling out units, and expressing the final answer as a rough order of magnitude