OK, let's work through this together. We're starting with 665 and we're going to multiply it by 52, which means we add 665 to itself 52 times.
Step 1: 0 + 665 = 665
Step 2: 665 + 665 = 1330
Step 3: 1330 + 665 = 1995
Step 4: 1995 + 665 = 2660
Step 5: 2660 + 665 = 3325
Step 6: 3325 + 665 = 3990
Step 7: 3990 + 665 = 4655
Step 8: 4655 + 665 = 5320
Step 9: 5320 + 665 = 5985
Step 10: 5985 + 665 = 6650
Step 11: 6650 + 665 = 7315
Step 12: 7315 + 665 = 7980
Step 13: 7980 + 665 = 8645
Step 14: 8645 + 665 = 9310
Step 15: 9310 + 665 = 9975
Step 16: 9975 + 665 = 10640
Step 17: 10640 + 665 = 11305
Step 18: 11305 + 665 = 11970
Step 19: 11970 + 665 = 12635
Step 20: 12635 + 665 = 13300
Step 21: 13300 + 665 = 13965
Step 22: 13965 + 665 = 14630
Step 23: 14630 + 665 = 15295
Step 24: 15295 + 665 = 15960
Step 25: 15960 + 665 = 16625
Step 26: 16625 + 665 = 17290
Step 27: 17290 + 665 = 17955
Step 28: 17955 + 665 = 18620
Step 29: 18620 + 665 = 19285
Step 30: 19285 + 665 = 19950
Step 31: 19950 + 665 = 20615
Step 32: 20615 + 665 = 21280
Step 33: 21280 + 665 = 21945
Step 34: 21945 + 665 = 22610
Step 35: 22610 + 665 = 23275
Step 36: 23275 + 665 = 23940
Step 37: 23940 + 665 = 24605
Step 38: 24605 + 665 = 25270
Step 39: 25270 + 665 = 25935
Step 40: 25935 + 665 = 26600
Step 41: 26600 + 665 = 27265
Step 42: 27265 + 665 = 27930
Step 43: 27930 + 665 = 28595
Step 44: 28595 + 665 = 29260
Step 45: 29260 + 665 = 29925
Step 46: 29925 + 665 = 30590
Step 47: 30590 + 665 = 31255
Step 48: 31255 + 665 = 31920
Step 49: 31920 + 665 = 32585
Step 50: 32585 + 665 = 33250
Step 51: 33250 + 665 = 33915
Step 52: 33915 + 665 = 34580

So, 665*52 = 34580