Let's roll up our sleeves and solve this. We have 607 and we're going to multiply it by 67, essentially adding 607 to itself 67 times.
Step 1: 0 + 607 = 607
Step 2: 607 + 607 = 1214
Step 3: 1214 + 607 = 1821
Step 4: 1821 + 607 = 2428
Step 5: 2428 + 607 = 3035
Step 6: 3035 + 607 = 3642
Step 7: 3642 + 607 = 4249
Step 8: 4249 + 607 = 4856
Step 9: 4856 + 607 = 5463
Step 10: 5463 + 607 = 6070
Step 11: 6070 + 607 = 6677
Step 12: 6677 + 607 = 7284
Step 13: 7284 + 607 = 7891
Step 14: 7891 + 607 = 8498
Step 15: 8498 + 607 = 9105
Step 16: 9105 + 607 = 9712
Step 17: 9712 + 607 = 10319
Step 18: 10319 + 607 = 10926
Step 19: 10926 + 607 = 11533
Step 20: 11533 + 607 = 12140
Step 21: 12140 + 607 = 12747
Step 22: 12747 + 607 = 13354
Step 23: 13354 + 607 = 13961
Step 24: 13961 + 607 = 14568
Step 25: 14568 + 607 = 15175
Step 26: 15175 + 607 = 15782
Step 27: 15782 + 607 = 16389
Step 28: 16389 + 607 = 16996
Step 29: 16996 + 607 = 17603
Step 30: 17603 + 607 = 18210
Step 31: 18210 + 607 = 18817
Step 32: 18817 + 607 = 19424
Step 33: 19424 + 607 = 20031
Step 34: 20031 + 607 = 20638
Step 35: 20638 + 607 = 21245
Step 36: 21245 + 607 = 21852
Step 37: 21852 + 607 = 22459
Step 38: 22459 + 607 = 23066
Step 39: 23066 + 607 = 23673
Step 40: 23673 + 607 = 24280
Step 41: 24280 + 607 = 24887
Step 42: 24887 + 607 = 25494
Step 43: 25494 + 607 = 26101
Step 44: 26101 + 607 = 26708
Step 45: 26708 + 607 = 27315
Step 46: 27315 + 607 = 27922
Step 47: 27922 + 607 = 28529
Step 48: 28529 + 607 = 29136
Step 49: 29136 + 607 = 29743
Step 50: 29743 + 607 = 30350
Step 51: 30350 + 607 = 30957
Step 52: 30957 + 607 = 31564
Step 53: 31564 + 607 = 32171
Step 54: 32171 + 607 = 32778
Step 55: 32778 + 607 = 33385
Step 56: 33385 + 607 = 33992
Step 57: 33992 + 607 = 34599
Step 58: 34599 + 607 = 35206
Step 59: 35206 + 607 = 35813
Step 60: 35813 + 607 = 36420
Step 61: 36420 + 607 = 37027
Step 62: 37027 + 607 = 37634
Step 63: 37634 + 607 = 38241
Step 64: 38241 + 607 = 38848
Step 65: 38848 + 607 = 39455
Step 66: 39455 + 607 = 40062
Step 67: 40062 + 607 = 40669

So, 607*67 = 40669