Its simple rocket math. Every lb of weight must consume fuel.

Si.pky. 1 lb of weight needs 1 lb of fuel to escape orbit. But the fuel has weight also. So the effective fuel you need to lift the rocket and payload is exponential.

The harder stuff is orbital mechanics. Getting things into orbit is easy. Having thwm go where you want is the hard part.

• Artemis tanks were 10m wide and 30m tall.
• Cylinder surface Area = (2.pi.r^2^) * (2.pi.r.h) ^[curved area plus top and bottom circles]
  • 2 * pi * 5 * 30 ~ 1100m^2^ to paint
• Paint paints about 10m^2^ per Litre paint
• Need 1100 / 10 = 110 Litres of paint
• 1L of paint weighs about 2kg
• 110 Litres of paint weighs about 220kg

Til dyscalculia. I hope you weren't born in asia