Question 905278
m for weight (which really should be mass, not weight).
x,y,z for length width thickness


{{{highlight_green(m=kxyz)}}}, your formula.


The specific case described gives {{{18.7=k(12*8*6)}}}
{{{k=18.7/(12*8*6)}}}
{{{k=0.0324}}}


You can revise your formula to {{{highlight(m=xyz*0.0324)}}}.