Alright, let's solve this math problem step by step. First, we have the number 909. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 135. So, we're going to take the number 909 and add it to itself 135 times.
Step 1: 0 + 909 = 909
Step 2: 909 + 909 = 1818
Step 3: 1818 + 909 = 2727
Step 4: 2727 + 909 = 3636
Step 5: 3636 + 909 = 4545
Step 6: 4545 + 909 = 5454
Step 7: 5454 + 909 = 6363
Step 8: 6363 + 909 = 7272
Step 9: 7272 + 909 = 8181
Step 10: 8181 + 909 = 9090
Step 11: 9090 + 909 = 9999
Step 12: 9999 + 909 = 10908
Step 13: 10908 + 909 = 11817
Step 14: 11817 + 909 = 12726
Step 15: 12726 + 909 = 13635
Step 16: 13635 + 909 = 14544
Step 17: 14544 + 909 = 15453
Step 18: 15453 + 909 = 16362
Step 19: 16362 + 909 = 17271
Step 20: 17271 + 909 = 18180
Step 21: 18180 + 909 = 19089
Step 22: 19089 + 909 = 19998
Step 23: 19998 + 909 = 20907
Step 24: 20907 + 909 = 21816
Step 25: 21816 + 909 = 22725
Step 26: 22725 + 909 = 23634
Step 27: 23634 + 909 = 24543
Step 28: 24543 + 909 = 25452
Step 29: 25452 + 909 = 26361
Step 30: 26361 + 909 = 27270
Step 31: 27270 + 909 = 28179
Step 32: 28179 + 909 = 29088
Step 33: 29088 + 909 = 29997
Step 34: 29997 + 909 = 30906
Step 35: 30906 + 909 = 31815
Step 36: 31815 + 909 = 32724
Step 37: 32724 + 909 = 33633
Step 38: 33633 + 909 = 34542
Step 39: 34542 + 909 = 35451
Step 40: 35451 + 909 = 36360
Step 41: 36360 + 909 = 37269
Step 42: 37269 + 909 = 38178
Step 43: 38178 + 909 = 39087
Step 44: 39087 + 909 = 39996
Step 45: 39996 + 909 = 40905
Step 46: 40905 + 909 = 41814
Step 47: 41814 + 909 = 42723
Step 48: 42723 + 909 = 43632
Step 49: 43632 + 909 = 44541
Step 50: 44541 + 909 = 45450
Step 51: 45450 + 909 = 46359
Step 52: 46359 + 909 = 47268
Step 53: 47268 + 909 = 48177
Step 54: 48177 + 909 = 49086
Step 55: 49086 + 909 = 49995
Step 56: 49995 + 909 = 50904
Step 57: 50904 + 909 = 51813
Step 58: 51813 + 909 = 52722
Step 59: 52722 + 909 = 53631
Step 60: 53631 + 909 = 54540
Step 61: 54540 + 909 = 55449
Step 62: 55449 + 909 = 56358
Step 63: 56358 + 909 = 57267
Step 64: 57267 + 909 = 58176
Step 65: 58176 + 909 = 59085
Step 66: 59085 + 909 = 59994
Step 67: 59994 + 909 = 60903
Step 68: 60903 + 909 = 61812
Step 69: 61812 + 909 = 62721
Step 70: 62721 + 909 = 63630
Step 71: 63630 + 909 = 64539
Step 72: 64539 + 909 = 65448
Step 73: 65448 + 909 = 66357
Step 74: 66357 + 909 = 67266
Step 75: 67266 + 909 = 68175
Step 76: 68175 + 909 = 69084
Step 77: 69084 + 909 = 69993
Step 78: 69993 + 909 = 70902
Step 79: 70902 + 909 = 71811
Step 80: 71811 + 909 = 72720
Step 81: 72720 + 909 = 73629
Step 82: 73629 + 909 = 74538
Step 83: 74538 + 909 = 75447
Step 84: 75447 + 909 = 76356
Step 85: 76356 + 909 = 77265
Step 86: 77265 + 909 = 78174
Step 87: 78174 + 909 = 79083
Step 88: 79083 + 909 = 79992
Step 89: 79992 + 909 = 80901
Step 90: 80901 + 909 = 81810
Step 91: 81810 + 909 = 82719
Step 92: 82719 + 909 = 83628
Step 93: 83628 + 909 = 84537
Step 94: 84537 + 909 = 85446
Step 95: 85446 + 909 = 86355
Step 96: 86355 + 909 = 87264
Step 97: 87264 + 909 = 88173
Step 98: 88173 + 909 = 89082
Step 99: 89082 + 909 = 89991
Step 100: 89991 + 909 = 90900
Step 101: 90900 + 909 = 91809
Step 102: 91809 + 909 = 92718
Step 103: 92718 + 909 = 93627
Step 104: 93627 + 909 = 94536
Step 105: 94536 + 909 = 95445
Step 106: 95445 + 909 = 96354
Step 107: 96354 + 909 = 97263
Step 108: 97263 + 909 = 98172
Step 109: 98172 + 909 = 99081
Step 110: 99081 + 909 = 99990
Step 111: 99990 + 909 = 100899
Step 112: 100899 + 909 = 101808
Step 113: 101808 + 909 = 102717
Step 114: 102717 + 909 = 103626
Step 115: 103626 + 909 = 104535
Step 116: 104535 + 909 = 105444
Step 117: 105444 + 909 = 106353
Step 118: 106353 + 909 = 107262
Step 119: 107262 + 909 = 108171
Step 120: 108171 + 909 = 109080
Step 121: 109080 + 909 = 109989
Step 122: 109989 + 909 = 110898
Step 123: 110898 + 909 = 111807
Step 124: 111807 + 909 = 112716
Step 125: 112716 + 909 = 113625
Step 126: 113625 + 909 = 114534
Step 127: 114534 + 909 = 115443
Step 128: 115443 + 909 = 116352
Step 129: 116352 + 909 = 117261
Step 130: 117261 + 909 = 118170
Step 131: 118170 + 909 = 119079
Step 132: 119079 + 909 = 119988
Step 133: 119988 + 909 = 120897
Step 134: 120897 + 909 = 121806
Step 135: 121806 + 909 = 122715

So, 909*135 = 122715