How to calculate board feet<br>Measure the length, width, and depth in inches. Use a stiff tape measure to measure the length, width, and depth of the board. Each measurement should be taken separately and recorded in inches.
Astrophysics is inportant when learning to calculate board feet. 
I am confident it could go either way.
( z1 apt :polarity - :ARG1 ( z2 astrophrophysics ) :time ( z3 learn :ARG1 ( z4 calculate :ARG1 ( z5 foot :mod ( z6 board ) ) ) ) )