OK, let's work through this together. We're starting with 441 and we're going to multiply it by 39, which means we add 441 to itself 39 times.
Step 1: 0 + 441 = 441
Step 2: 441 + 441 = 882
Step 3: 882 + 441 = 1323
Step 4: 1323 + 441 = 1764
Step 5: 1764 + 441 = 2205
Step 6: 2205 + 441 = 2646
Step 7: 2646 + 441 = 3087
Step 8: 3087 + 441 = 3528
Step 9: 3528 + 441 = 3969
Step 10: 3969 + 441 = 4410
Step 11: 4410 + 441 = 4851
Step 12: 4851 + 441 = 5292
Step 13: 5292 + 441 = 5733
Step 14: 5733 + 441 = 6174
Step 15: 6174 + 441 = 6615
Step 16: 6615 + 441 = 7056
Step 17: 7056 + 441 = 7497
Step 18: 7497 + 441 = 7938
Step 19: 7938 + 441 = 8379
Step 20: 8379 + 441 = 8820
Step 21: 8820 + 441 = 9261
Step 22: 9261 + 441 = 9702
Step 23: 9702 + 441 = 10143
Step 24: 10143 + 441 = 10584
Step 25: 10584 + 441 = 11025
Step 26: 11025 + 441 = 11466
Step 27: 11466 + 441 = 11907
Step 28: 11907 + 441 = 12348
Step 29: 12348 + 441 = 12789
Step 30: 12789 + 441 = 13230
Step 31: 13230 + 441 = 13671
Step 32: 13671 + 441 = 14112
Step 33: 14112 + 441 = 14553
Step 34: 14553 + 441 = 14994
Step 35: 14994 + 441 = 15435
Step 36: 15435 + 441 = 15876
Step 37: 15876 + 441 = 16317
Step 38: 16317 + 441 = 16758
Step 39: 16758 + 441 = 17199

So, 441*39 = 17199