OK, let's crack this. We're given 544 and our task is to multiply it by 23. Essentially, we'll be adding 544 to itself 23 times.
Step 1: 0 + 544 = 544
Step 2: 544 + 544 = 1088
Step 3: 1088 + 544 = 1632
Step 4: 1632 + 544 = 2176
Step 5: 2176 + 544 = 2720
Step 6: 2720 + 544 = 3264
Step 7: 3264 + 544 = 3808
Step 8: 3808 + 544 = 4352
Step 9: 4352 + 544 = 4896
Step 10: 4896 + 544 = 5440
Step 11: 5440 + 544 = 5984
Step 12: 5984 + 544 = 6528
Step 13: 6528 + 544 = 7072
Step 14: 7072 + 544 = 7616
Step 15: 7616 + 544 = 8160
Step 16: 8160 + 544 = 8704
Step 17: 8704 + 544 = 9248
Step 18: 9248 + 544 = 9792
Step 19: 9792 + 544 = 10336
Step 20: 10336 + 544 = 10880
Step 21: 10880 + 544 = 11424
Step 22: 11424 + 544 = 11968
Step 23: 11968 + 544 = 12512

So, 544*23 = 12512