Let's get this math done. We have 272 and we're going to multiply it by 45. This is the same as taking 272 and adding it to itself 45 times.
Step 1: 0 + 272 = 272
Step 2: 272 + 272 = 544
Step 3: 544 + 272 = 816
Step 4: 816 + 272 = 1088
Step 5: 1088 + 272 = 1360
Step 6: 1360 + 272 = 1632
Step 7: 1632 + 272 = 1904
Step 8: 1904 + 272 = 2176
Step 9: 2176 + 272 = 2448
Step 10: 2448 + 272 = 2720
Step 11: 2720 + 272 = 2992
Step 12: 2992 + 272 = 3264
Step 13: 3264 + 272 = 3536
Step 14: 3536 + 272 = 3808
Step 15: 3808 + 272 = 4080
Step 16: 4080 + 272 = 4352
Step 17: 4352 + 272 = 4624
Step 18: 4624 + 272 = 4896
Step 19: 4896 + 272 = 5168
Step 20: 5168 + 272 = 5440
Step 21: 5440 + 272 = 5712
Step 22: 5712 + 272 = 5984
Step 23: 5984 + 272 = 6256
Step 24: 6256 + 272 = 6528
Step 25: 6528 + 272 = 6800
Step 26: 6800 + 272 = 7072
Step 27: 7072 + 272 = 7344
Step 28: 7344 + 272 = 7616
Step 29: 7616 + 272 = 7888
Step 30: 7888 + 272 = 8160
Step 31: 8160 + 272 = 8432
Step 32: 8432 + 272 = 8704
Step 33: 8704 + 272 = 8976
Step 34: 8976 + 272 = 9248
Step 35: 9248 + 272 = 9520
Step 36: 9520 + 272 = 9792
Step 37: 9792 + 272 = 10064
Step 38: 10064 + 272 = 10336
Step 39: 10336 + 272 = 10608
Step 40: 10608 + 272 = 10880
Step 41: 10880 + 272 = 11152
Step 42: 11152 + 272 = 11424
Step 43: 11424 + 272 = 11696
Step 44: 11696 + 272 = 11968
Step 45: 11968 + 272 = 12240

So, 272*45 = 12240