300x2000x5327-(23182:2+280x2321)
3195538529
1) 23182:2= 11591 2) 2321*280=649880 3) 649880 + 11591 = 661471 4) 2000*300=600000 5) 600 000 * 5327 = 3196200000 6) 3196200000-661471=3 195 538 529