21576 * 3 = 6472864728 - 18340 = 4638846388 / 2 = 2319423194 + 12576 = 35770
Therefore, 21576×3-18340:2+12576 = 35770.
21576 * 3 = 64728
64728 - 18340 = 46388
46388 / 2 = 23194
23194 + 12576 = 35770
Therefore, 21576×3-18340:2+12576 = 35770.