parabola w1 0 0 0 1 0 0 0 0 1 50
mkedge w1 w1 -100 100
polyline w2 0 -100 50 0 100 50
wire w w1 w2
mkplane w w
prism s w 20 0 100
tscale s 0 0 0 SCALE1
explode s E
mkevol result s
updatevol s_2 0 1*SCALE1 1 2*SCALE1 2 1*SCALE1
buildevol

set square 5.10383e+06