x1 is Newton's constant of universal gravitation/G/big G [approximately equal to: 6.67×10(−11) N·(m/kg)2 ] expressed in units x2 (default: unitless/dimensionless and equal to 1) in paradigm/system/metaphysics/universe x3 (default: this, our actual, physical universe)
See also: plankexu, tcelerita, boltsemaku, avgadro, ocnerta.