Alright, let's solve this math problem step by step. First, we have the number 605. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 66. So, we're going to take the number 605 and add it to itself 66 times.
Step 1: 0 + 605 = 605
Step 2: 605 + 605 = 1210
Step 3: 1210 + 605 = 1815
Step 4: 1815 + 605 = 2420
Step 5: 2420 + 605 = 3025
Step 6: 3025 + 605 = 3630
Step 7: 3630 + 605 = 4235
Step 8: 4235 + 605 = 4840
Step 9: 4840 + 605 = 5445
Step 10: 5445 + 605 = 6050
Step 11: 6050 + 605 = 6655
Step 12: 6655 + 605 = 7260
Step 13: 7260 + 605 = 7865
Step 14: 7865 + 605 = 8470
Step 15: 8470 + 605 = 9075
Step 16: 9075 + 605 = 9680
Step 17: 9680 + 605 = 10285
Step 18: 10285 + 605 = 10890
Step 19: 10890 + 605 = 11495
Step 20: 11495 + 605 = 12100
Step 21: 12100 + 605 = 12705
Step 22: 12705 + 605 = 13310
Step 23: 13310 + 605 = 13915
Step 24: 13915 + 605 = 14520
Step 25: 14520 + 605 = 15125
Step 26: 15125 + 605 = 15730
Step 27: 15730 + 605 = 16335
Step 28: 16335 + 605 = 16940
Step 29: 16940 + 605 = 17545
Step 30: 17545 + 605 = 18150
Step 31: 18150 + 605 = 18755
Step 32: 18755 + 605 = 19360
Step 33: 19360 + 605 = 19965
Step 34: 19965 + 605 = 20570
Step 35: 20570 + 605 = 21175
Step 36: 21175 + 605 = 21780
Step 37: 21780 + 605 = 22385
Step 38: 22385 + 605 = 22990
Step 39: 22990 + 605 = 23595
Step 40: 23595 + 605 = 24200
Step 41: 24200 + 605 = 24805
Step 42: 24805 + 605 = 25410
Step 43: 25410 + 605 = 26015
Step 44: 26015 + 605 = 26620
Step 45: 26620 + 605 = 27225
Step 46: 27225 + 605 = 27830
Step 47: 27830 + 605 = 28435
Step 48: 28435 + 605 = 29040
Step 49: 29040 + 605 = 29645
Step 50: 29645 + 605 = 30250
Step 51: 30250 + 605 = 30855
Step 52: 30855 + 605 = 31460
Step 53: 31460 + 605 = 32065
Step 54: 32065 + 605 = 32670
Step 55: 32670 + 605 = 33275
Step 56: 33275 + 605 = 33880
Step 57: 33880 + 605 = 34485
Step 58: 34485 + 605 = 35090
Step 59: 35090 + 605 = 35695
Step 60: 35695 + 605 = 36300
Step 61: 36300 + 605 = 36905
Step 62: 36905 + 605 = 37510
Step 63: 37510 + 605 = 38115
Step 64: 38115 + 605 = 38720
Step 65: 38720 + 605 = 39325
Step 66: 39325 + 605 = 39930

So, 605*66 = 39930