The Feat:
Mars, who is half of the Greek God Ares, went and matched the size and scope of a Promethan Giant, a being whose hands span entire Solar Systems.
Size & Mass Calc:
The average human hand has a size of 7.44 Inches, or 18.8976 centimeters
The average american male is 177 cm tall.
The Solar System has a diameter of 9090000000 kilometers, or 909000000000000 cm
Using these proportions, we get a final height of 8.51393828e15 cm, or 85,139,382,800 kilometers.
About 9.36626873 times the size of our Solar System.
That's just size, let's look at his mass since he is a living being rather than just mostly empty space.
The average man is 177 cm tall. And the average man also weights about 88.67 kilograms
Using the square cube law:
m² = m¹(l2/l1)^3
M² = 88.69(8.51393828e13/1.77)^3
M² = 88.69(4.81013462e13)^3
M² = 88.69 * 1.11293985e41 = 9.87066353e42 Kg or 4.96282582e12 Solar Masses. By comparison the Milky Way is 5.8e11 solar masses.
Alternate Mass Calc:
The Solar System diameter is 79 AU = 11.82*10^12 m, making a relation between hands properties being:
Hand length = 19.38 cm
Hand wide = 9.02 cm
Hand thickness = 2.35 cm
So, Hw = 0.465*Hl = 5.5*10^12 m; and Ht = 0.1212*Hl = 1.433*10^12 m. So the volume would be Hv = Hl*Hw*Ht = 93.16*10^36 m^3
Hand volume would be ~400 cc, and average human volume would be 70k cc, that would means that one hand will cover 0.57% of the human volume, so Promethean volume would be V = Hv/0.0057 = 16.34*10^39 m^3. Finally, multiply that per human body density (1062 kg/m^3) and result is 17.36*10^42 kg
GBE Calc:
T he Giant'svolume is 16.34*10^39 m^3, so supposed radious would be R =' ['V*3/(4*pi)]^(1/3) = 15.742*10^12 m
With radious 2470853 times bigger than Earth, and density 0.1925 times Earth's density, GBE = 2470853^5*0.1925^2*2.24*10^32 = 764.44*10^60 J, that is 4-A