=(258+256+216+321)x3=258x3+256x3+216x3+321x3=3123
258 + 258 + 258 + 256 + 256 + 256 + 216 + 216 + 216 + 321 + 321 + 321 = ( 258 x 3 ) + ( 256 x 3 ) + ( 216 x3 ) + ( 321 x 3 )
= 2823.
=258 * 3 + 256 * 3 + 216 * 3 = 774 + 768 + 648=2190
258 * 3 + 256 * 3 + 216 * 3 + 321 * 3 = 774 + 768 + 648 + 963 =3153