Convert from cape rood to X unit

Unit Definition (cape rood)
The cape rood is a traditional unit of distance in South Africa, equal to 12 Cape feet or 12.396 English feet (3.7783 meters).

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.