OK, let's work through this together. We're starting with 419 and we're going to multiply it by 70, which means we add 419 to itself 70 times.
Step 1: 0 + 419 = 419
Step 2: 419 + 419 = 838
Step 3: 838 + 419 = 1257
Step 4: 1257 + 419 = 1676
Step 5: 1676 + 419 = 2095
Step 6: 2095 + 419 = 2514
Step 7: 2514 + 419 = 2933
Step 8: 2933 + 419 = 3352
Step 9: 3352 + 419 = 3771
Step 10: 3771 + 419 = 4190
Step 11: 4190 + 419 = 4609
Step 12: 4609 + 419 = 5028
Step 13: 5028 + 419 = 5447
Step 14: 5447 + 419 = 5866
Step 15: 5866 + 419 = 6285
Step 16: 6285 + 419 = 6704
Step 17: 6704 + 419 = 7123
Step 18: 7123 + 419 = 7542
Step 19: 7542 + 419 = 7961
Step 20: 7961 + 419 = 8380
Step 21: 8380 + 419 = 8799
Step 22: 8799 + 419 = 9218
Step 23: 9218 + 419 = 9637
Step 24: 9637 + 419 = 10056
Step 25: 10056 + 419 = 10475
Step 26: 10475 + 419 = 10894
Step 27: 10894 + 419 = 11313
Step 28: 11313 + 419 = 11732
Step 29: 11732 + 419 = 12151
Step 30: 12151 + 419 = 12570
Step 31: 12570 + 419 = 12989
Step 32: 12989 + 419 = 13408
Step 33: 13408 + 419 = 13827
Step 34: 13827 + 419 = 14246
Step 35: 14246 + 419 = 14665
Step 36: 14665 + 419 = 15084
Step 37: 15084 + 419 = 15503
Step 38: 15503 + 419 = 15922
Step 39: 15922 + 419 = 16341
Step 40: 16341 + 419 = 16760
Step 41: 16760 + 419 = 17179
Step 42: 17179 + 419 = 17598
Step 43: 17598 + 419 = 18017
Step 44: 18017 + 419 = 18436
Step 45: 18436 + 419 = 18855
Step 46: 18855 + 419 = 19274
Step 47: 19274 + 419 = 19693
Step 48: 19693 + 419 = 20112
Step 49: 20112 + 419 = 20531
Step 50: 20531 + 419 = 20950
Step 51: 20950 + 419 = 21369
Step 52: 21369 + 419 = 21788
Step 53: 21788 + 419 = 22207
Step 54: 22207 + 419 = 22626
Step 55: 22626 + 419 = 23045
Step 56: 23045 + 419 = 23464
Step 57: 23464 + 419 = 23883
Step 58: 23883 + 419 = 24302
Step 59: 24302 + 419 = 24721
Step 60: 24721 + 419 = 25140
Step 61: 25140 + 419 = 25559
Step 62: 25559 + 419 = 25978
Step 63: 25978 + 419 = 26397
Step 64: 26397 + 419 = 26816
Step 65: 26816 + 419 = 27235
Step 66: 27235 + 419 = 27654
Step 67: 27654 + 419 = 28073
Step 68: 28073 + 419 = 28492
Step 69: 28492 + 419 = 28911
Step 70: 28911 + 419 = 29330

So, 419*70 = 29330