OK, let's work through this together. We're starting with 880 and we're going to multiply it by 49, which means we add 880 to itself 49 times.
Step 1: 0 + 880 = 880
Step 2: 880 + 880 = 1760
Step 3: 1760 + 880 = 2640
Step 4: 2640 + 880 = 3520
Step 5: 3520 + 880 = 4400
Step 6: 4400 + 880 = 5280
Step 7: 5280 + 880 = 6160
Step 8: 6160 + 880 = 7040
Step 9: 7040 + 880 = 7920
Step 10: 7920 + 880 = 8800
Step 11: 8800 + 880 = 9680
Step 12: 9680 + 880 = 10560
Step 13: 10560 + 880 = 11440
Step 14: 11440 + 880 = 12320
Step 15: 12320 + 880 = 13200
Step 16: 13200 + 880 = 14080
Step 17: 14080 + 880 = 14960
Step 18: 14960 + 880 = 15840
Step 19: 15840 + 880 = 16720
Step 20: 16720 + 880 = 17600
Step 21: 17600 + 880 = 18480
Step 22: 18480 + 880 = 19360
Step 23: 19360 + 880 = 20240
Step 24: 20240 + 880 = 21120
Step 25: 21120 + 880 = 22000
Step 26: 22000 + 880 = 22880
Step 27: 22880 + 880 = 23760
Step 28: 23760 + 880 = 24640
Step 29: 24640 + 880 = 25520
Step 30: 25520 + 880 = 26400
Step 31: 26400 + 880 = 27280
Step 32: 27280 + 880 = 28160
Step 33: 28160 + 880 = 29040
Step 34: 29040 + 880 = 29920
Step 35: 29920 + 880 = 30800
Step 36: 30800 + 880 = 31680
Step 37: 31680 + 880 = 32560
Step 38: 32560 + 880 = 33440
Step 39: 33440 + 880 = 34320
Step 40: 34320 + 880 = 35200
Step 41: 35200 + 880 = 36080
Step 42: 36080 + 880 = 36960
Step 43: 36960 + 880 = 37840
Step 44: 37840 + 880 = 38720
Step 45: 38720 + 880 = 39600
Step 46: 39600 + 880 = 40480
Step 47: 40480 + 880 = 41360
Step 48: 41360 + 880 = 42240
Step 49: 42240 + 880 = 43120

So, 880*49 = 43120