2*4*8.5+2*4*3+2*8.5*3=
(2*4*8.5 ) + (2*4*3 ) + (2*8.5*3) =
(8 * 8.5) + 24 + (6 * 8.5) =
8.5(8 + 6) + 24 =
8.5 * 14 + 24 =
119 + 24 =
143
