Convert from cuadra [Argentina] to X unit

Unit Definition (cuadra [Argentina])
In Argentina and Chile, the cuadra is equal to 150 varas (roughly 130 meters or 410 feet). Elsewhere in south and central america, the cuadra is equal to 100 varas.

Unit Definition (X unit)
The X-unit (symbol xu) is a unit of length formerly used to measure the wavelength of X-rays and gamma rays. The X-unit is approximately 1.0021×10-13 metre. Defined by the Swedish physicist Karl Manne Georg Siegbahn (1886-1978) in 1925, the X-unit could not at that time be measured directly; the definition was instead made in terms of the spacing between planes of the calcite crystals used in the measuring apparatus.