ID=5 in/64  = 0.0781 in length = 7.9 in volume=(pi/4)*ID^2*length to mL  = 0.621 mL newID=[(5in/64),(1in/8), (3in/16), (1in/4)]  = [0.0781 in, 0.125 in, 0.188 in, ...] newLength=Each(newID, item=>volume/((pi/4)*item^2)) to in  = [7.9 in, 3.086 in, 1.372 in, ...] areas=(pi/4)*newID^2  = [0.00479 in^2, 0.0123 in^2, 0.0276 in^2, ...] volumeArray=[volume, volume, volume, volume]  = [0.621 mL, 0.621 mL, 0.621 mL, ...] newLength2=volumeArray/areas to in  = [7.9 in, 3.086 in, 1.372 in, ...]