Let's get this math done. We have 803 and we're going to multiply it by 23. This is the same as taking 803 and adding it to itself 23 times.
Step 1: 0 + 803 = 803
Step 2: 803 + 803 = 1606
Step 3: 1606 + 803 = 2409
Step 4: 2409 + 803 = 3212
Step 5: 3212 + 803 = 4015
Step 6: 4015 + 803 = 4818
Step 7: 4818 + 803 = 5621
Step 8: 5621 + 803 = 6424
Step 9: 6424 + 803 = 7227
Step 10: 7227 + 803 = 8030
Step 11: 8030 + 803 = 8833
Step 12: 8833 + 803 = 9636
Step 13: 9636 + 803 = 10439
Step 14: 10439 + 803 = 11242
Step 15: 11242 + 803 = 12045
Step 16: 12045 + 803 = 12848
Step 17: 12848 + 803 = 13651
Step 18: 13651 + 803 = 14454
Step 19: 14454 + 803 = 15257
Step 20: 15257 + 803 = 16060
Step 21: 16060 + 803 = 16863
Step 22: 16863 + 803 = 17666
Step 23: 17666 + 803 = 18469

So, 803*23 = 18469