Alright, let's solve this math problem step by step. First, we have the number 153. 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 153 and add it to itself 135 times.
Step 1: 0 + 153 = 153
Step 2: 153 + 153 = 306
Step 3: 306 + 153 = 459
Step 4: 459 + 153 = 612
Step 5: 612 + 153 = 765
Step 6: 765 + 153 = 918
Step 7: 918 + 153 = 1071
Step 8: 1071 + 153 = 1224
Step 9: 1224 + 153 = 1377
Step 10: 1377 + 153 = 1530
Step 11: 1530 + 153 = 1683
Step 12: 1683 + 153 = 1836
Step 13: 1836 + 153 = 1989
Step 14: 1989 + 153 = 2142
Step 15: 2142 + 153 = 2295
Step 16: 2295 + 153 = 2448
Step 17: 2448 + 153 = 2601
Step 18: 2601 + 153 = 2754
Step 19: 2754 + 153 = 2907
Step 20: 2907 + 153 = 3060
Step 21: 3060 + 153 = 3213
Step 22: 3213 + 153 = 3366
Step 23: 3366 + 153 = 3519
Step 24: 3519 + 153 = 3672
Step 25: 3672 + 153 = 3825
Step 26: 3825 + 153 = 3978
Step 27: 3978 + 153 = 4131
Step 28: 4131 + 153 = 4284
Step 29: 4284 + 153 = 4437
Step 30: 4437 + 153 = 4590
Step 31: 4590 + 153 = 4743
Step 32: 4743 + 153 = 4896
Step 33: 4896 + 153 = 5049
Step 34: 5049 + 153 = 5202
Step 35: 5202 + 153 = 5355
Step 36: 5355 + 153 = 5508
Step 37: 5508 + 153 = 5661
Step 38: 5661 + 153 = 5814
Step 39: 5814 + 153 = 5967
Step 40: 5967 + 153 = 6120
Step 41: 6120 + 153 = 6273
Step 42: 6273 + 153 = 6426
Step 43: 6426 + 153 = 6579
Step 44: 6579 + 153 = 6732
Step 45: 6732 + 153 = 6885
Step 46: 6885 + 153 = 7038
Step 47: 7038 + 153 = 7191
Step 48: 7191 + 153 = 7344
Step 49: 7344 + 153 = 7497
Step 50: 7497 + 153 = 7650
Step 51: 7650 + 153 = 7803
Step 52: 7803 + 153 = 7956
Step 53: 7956 + 153 = 8109
Step 54: 8109 + 153 = 8262
Step 55: 8262 + 153 = 8415
Step 56: 8415 + 153 = 8568
Step 57: 8568 + 153 = 8721
Step 58: 8721 + 153 = 8874
Step 59: 8874 + 153 = 9027
Step 60: 9027 + 153 = 9180
Step 61: 9180 + 153 = 9333
Step 62: 9333 + 153 = 9486
Step 63: 9486 + 153 = 9639
Step 64: 9639 + 153 = 9792
Step 65: 9792 + 153 = 9945
Step 66: 9945 + 153 = 10098
Step 67: 10098 + 153 = 10251
Step 68: 10251 + 153 = 10404
Step 69: 10404 + 153 = 10557
Step 70: 10557 + 153 = 10710
Step 71: 10710 + 153 = 10863
Step 72: 10863 + 153 = 11016
Step 73: 11016 + 153 = 11169
Step 74: 11169 + 153 = 11322
Step 75: 11322 + 153 = 11475
Step 76: 11475 + 153 = 11628
Step 77: 11628 + 153 = 11781
Step 78: 11781 + 153 = 11934
Step 79: 11934 + 153 = 12087
Step 80: 12087 + 153 = 12240
Step 81: 12240 + 153 = 12393
Step 82: 12393 + 153 = 12546
Step 83: 12546 + 153 = 12699
Step 84: 12699 + 153 = 12852
Step 85: 12852 + 153 = 13005
Step 86: 13005 + 153 = 13158
Step 87: 13158 + 153 = 13311
Step 88: 13311 + 153 = 13464
Step 89: 13464 + 153 = 13617
Step 90: 13617 + 153 = 13770
Step 91: 13770 + 153 = 13923
Step 92: 13923 + 153 = 14076
Step 93: 14076 + 153 = 14229
Step 94: 14229 + 153 = 14382
Step 95: 14382 + 153 = 14535
Step 96: 14535 + 153 = 14688
Step 97: 14688 + 153 = 14841
Step 98: 14841 + 153 = 14994
Step 99: 14994 + 153 = 15147
Step 100: 15147 + 153 = 15300
Step 101: 15300 + 153 = 15453
Step 102: 15453 + 153 = 15606
Step 103: 15606 + 153 = 15759
Step 104: 15759 + 153 = 15912
Step 105: 15912 + 153 = 16065
Step 106: 16065 + 153 = 16218
Step 107: 16218 + 153 = 16371
Step 108: 16371 + 153 = 16524
Step 109: 16524 + 153 = 16677
Step 110: 16677 + 153 = 16830
Step 111: 16830 + 153 = 16983
Step 112: 16983 + 153 = 17136
Step 113: 17136 + 153 = 17289
Step 114: 17289 + 153 = 17442
Step 115: 17442 + 153 = 17595
Step 116: 17595 + 153 = 17748
Step 117: 17748 + 153 = 17901
Step 118: 17901 + 153 = 18054
Step 119: 18054 + 153 = 18207
Step 120: 18207 + 153 = 18360
Step 121: 18360 + 153 = 18513
Step 122: 18513 + 153 = 18666
Step 123: 18666 + 153 = 18819
Step 124: 18819 + 153 = 18972
Step 125: 18972 + 153 = 19125
Step 126: 19125 + 153 = 19278
Step 127: 19278 + 153 = 19431
Step 128: 19431 + 153 = 19584
Step 129: 19584 + 153 = 19737
Step 130: 19737 + 153 = 19890
Step 131: 19890 + 153 = 20043
Step 132: 20043 + 153 = 20196
Step 133: 20196 + 153 = 20349
Step 134: 20349 + 153 = 20502
Step 135: 20502 + 153 = 20655

So, 153*135 = 20655