Let's roll up our sleeves and solve this. We have 152 and we're going to multiply it by 103, essentially adding 152 to itself 103 times.
Step 1: 0 + 152 = 152
Step 2: 152 + 152 = 304
Step 3: 304 + 152 = 456
Step 4: 456 + 152 = 608
Step 5: 608 + 152 = 760
Step 6: 760 + 152 = 912
Step 7: 912 + 152 = 1064
Step 8: 1064 + 152 = 1216
Step 9: 1216 + 152 = 1368
Step 10: 1368 + 152 = 1520
Step 11: 1520 + 152 = 1672
Step 12: 1672 + 152 = 1824
Step 13: 1824 + 152 = 1976
Step 14: 1976 + 152 = 2128
Step 15: 2128 + 152 = 2280
Step 16: 2280 + 152 = 2432
Step 17: 2432 + 152 = 2584
Step 18: 2584 + 152 = 2736
Step 19: 2736 + 152 = 2888
Step 20: 2888 + 152 = 3040
Step 21: 3040 + 152 = 3192
Step 22: 3192 + 152 = 3344
Step 23: 3344 + 152 = 3496
Step 24: 3496 + 152 = 3648
Step 25: 3648 + 152 = 3800
Step 26: 3800 + 152 = 3952
Step 27: 3952 + 152 = 4104
Step 28: 4104 + 152 = 4256
Step 29: 4256 + 152 = 4408
Step 30: 4408 + 152 = 4560
Step 31: 4560 + 152 = 4712
Step 32: 4712 + 152 = 4864
Step 33: 4864 + 152 = 5016
Step 34: 5016 + 152 = 5168
Step 35: 5168 + 152 = 5320
Step 36: 5320 + 152 = 5472
Step 37: 5472 + 152 = 5624
Step 38: 5624 + 152 = 5776
Step 39: 5776 + 152 = 5928
Step 40: 5928 + 152 = 6080
Step 41: 6080 + 152 = 6232
Step 42: 6232 + 152 = 6384
Step 43: 6384 + 152 = 6536
Step 44: 6536 + 152 = 6688
Step 45: 6688 + 152 = 6840
Step 46: 6840 + 152 = 6992
Step 47: 6992 + 152 = 7144
Step 48: 7144 + 152 = 7296
Step 49: 7296 + 152 = 7448
Step 50: 7448 + 152 = 7600
Step 51: 7600 + 152 = 7752
Step 52: 7752 + 152 = 7904
Step 53: 7904 + 152 = 8056
Step 54: 8056 + 152 = 8208
Step 55: 8208 + 152 = 8360
Step 56: 8360 + 152 = 8512
Step 57: 8512 + 152 = 8664
Step 58: 8664 + 152 = 8816
Step 59: 8816 + 152 = 8968
Step 60: 8968 + 152 = 9120
Step 61: 9120 + 152 = 9272
Step 62: 9272 + 152 = 9424
Step 63: 9424 + 152 = 9576
Step 64: 9576 + 152 = 9728
Step 65: 9728 + 152 = 9880
Step 66: 9880 + 152 = 10032
Step 67: 10032 + 152 = 10184
Step 68: 10184 + 152 = 10336
Step 69: 10336 + 152 = 10488
Step 70: 10488 + 152 = 10640
Step 71: 10640 + 152 = 10792
Step 72: 10792 + 152 = 10944
Step 73: 10944 + 152 = 11096
Step 74: 11096 + 152 = 11248
Step 75: 11248 + 152 = 11400
Step 76: 11400 + 152 = 11552
Step 77: 11552 + 152 = 11704
Step 78: 11704 + 152 = 11856
Step 79: 11856 + 152 = 12008
Step 80: 12008 + 152 = 12160
Step 81: 12160 + 152 = 12312
Step 82: 12312 + 152 = 12464
Step 83: 12464 + 152 = 12616
Step 84: 12616 + 152 = 12768
Step 85: 12768 + 152 = 12920
Step 86: 12920 + 152 = 13072
Step 87: 13072 + 152 = 13224
Step 88: 13224 + 152 = 13376
Step 89: 13376 + 152 = 13528
Step 90: 13528 + 152 = 13680
Step 91: 13680 + 152 = 13832
Step 92: 13832 + 152 = 13984
Step 93: 13984 + 152 = 14136
Step 94: 14136 + 152 = 14288
Step 95: 14288 + 152 = 14440
Step 96: 14440 + 152 = 14592
Step 97: 14592 + 152 = 14744
Step 98: 14744 + 152 = 14896
Step 99: 14896 + 152 = 15048
Step 100: 15048 + 152 = 15200
Step 101: 15200 + 152 = 15352
Step 102: 15352 + 152 = 15504
Step 103: 15504 + 152 = 15656

So, 152*103 = 15656