OK, let's work through this together. We're starting with 445 and we're going to multiply it by 39, which means we add 445 to itself 39 times.
Step 1: 0 + 445 = 445
Step 2: 445 + 445 = 890
Step 3: 890 + 445 = 1335
Step 4: 1335 + 445 = 1780
Step 5: 1780 + 445 = 2225
Step 6: 2225 + 445 = 2670
Step 7: 2670 + 445 = 3115
Step 8: 3115 + 445 = 3560
Step 9: 3560 + 445 = 4005
Step 10: 4005 + 445 = 4450
Step 11: 4450 + 445 = 4895
Step 12: 4895 + 445 = 5340
Step 13: 5340 + 445 = 5785
Step 14: 5785 + 445 = 6230
Step 15: 6230 + 445 = 6675
Step 16: 6675 + 445 = 7120
Step 17: 7120 + 445 = 7565
Step 18: 7565 + 445 = 8010
Step 19: 8010 + 445 = 8455
Step 20: 8455 + 445 = 8900
Step 21: 8900 + 445 = 9345
Step 22: 9345 + 445 = 9790
Step 23: 9790 + 445 = 10235
Step 24: 10235 + 445 = 10680
Step 25: 10680 + 445 = 11125
Step 26: 11125 + 445 = 11570
Step 27: 11570 + 445 = 12015
Step 28: 12015 + 445 = 12460
Step 29: 12460 + 445 = 12905
Step 30: 12905 + 445 = 13350
Step 31: 13350 + 445 = 13795
Step 32: 13795 + 445 = 14240
Step 33: 14240 + 445 = 14685
Step 34: 14685 + 445 = 15130
Step 35: 15130 + 445 = 15575
Step 36: 15575 + 445 = 16020
Step 37: 16020 + 445 = 16465
Step 38: 16465 + 445 = 16910
Step 39: 16910 + 445 = 17355

So, 445*39 = 17355