Convert from button measure to pie [Texas]

Unit Definition (button measure)
The button measure is a unit of distance equal to 1/40 inch (0.635 millimeter), used to measure the thickness of buttons.

Unit Definition (pie [Texas])
The pie is a traditional foot of Spain. The pie equals 1/3 vara or 12 pulgadas. In Texas, 1/3 vara is 11 1/9 inches or 28.22 centimeters.