<s>[INST] How big is Earth? [/INST] The diameter of the Earth at the equator is 12,756 km.</s>\ <s>[INST] What is the volume of the earth? [/INST] Since earth  has a radius of 6378 km can be approximated as a sphere with a volume of $\frac{4}{3}\pi r^3$ we can conclude that the volume is approximately 1,086,781,292,543 cubic kilometers, a very good estimation of the actual value of 1,086,781,292 543 relatively close to the actual value of 1,083,207,000,000 only differing from the real value by approximately 1%</s>