OK, let's work through this together. We're starting with 440 and we're going to multiply it by 60, which means we add 440 to itself 60 times.
Step 1: 0 + 440 = 440
Step 2: 440 + 440 = 880
Step 3: 880 + 440 = 1320
Step 4: 1320 + 440 = 1760
Step 5: 1760 + 440 = 2200
Step 6: 2200 + 440 = 2640
Step 7: 2640 + 440 = 3080
Step 8: 3080 + 440 = 3520
Step 9: 3520 + 440 = 3960
Step 10: 3960 + 440 = 4400
Step 11: 4400 + 440 = 4840
Step 12: 4840 + 440 = 5280
Step 13: 5280 + 440 = 5720
Step 14: 5720 + 440 = 6160
Step 15: 6160 + 440 = 6600
Step 16: 6600 + 440 = 7040
Step 17: 7040 + 440 = 7480
Step 18: 7480 + 440 = 7920
Step 19: 7920 + 440 = 8360
Step 20: 8360 + 440 = 8800
Step 21: 8800 + 440 = 9240
Step 22: 9240 + 440 = 9680
Step 23: 9680 + 440 = 10120
Step 24: 10120 + 440 = 10560
Step 25: 10560 + 440 = 11000
Step 26: 11000 + 440 = 11440
Step 27: 11440 + 440 = 11880
Step 28: 11880 + 440 = 12320
Step 29: 12320 + 440 = 12760
Step 30: 12760 + 440 = 13200
Step 31: 13200 + 440 = 13640
Step 32: 13640 + 440 = 14080
Step 33: 14080 + 440 = 14520
Step 34: 14520 + 440 = 14960
Step 35: 14960 + 440 = 15400
Step 36: 15400 + 440 = 15840
Step 37: 15840 + 440 = 16280
Step 38: 16280 + 440 = 16720
Step 39: 16720 + 440 = 17160
Step 40: 17160 + 440 = 17600
Step 41: 17600 + 440 = 18040
Step 42: 18040 + 440 = 18480
Step 43: 18480 + 440 = 18920
Step 44: 18920 + 440 = 19360
Step 45: 19360 + 440 = 19800
Step 46: 19800 + 440 = 20240
Step 47: 20240 + 440 = 20680
Step 48: 20680 + 440 = 21120
Step 49: 21120 + 440 = 21560
Step 50: 21560 + 440 = 22000
Step 51: 22000 + 440 = 22440
Step 52: 22440 + 440 = 22880
Step 53: 22880 + 440 = 23320
Step 54: 23320 + 440 = 23760
Step 55: 23760 + 440 = 24200
Step 56: 24200 + 440 = 24640
Step 57: 24640 + 440 = 25080
Step 58: 25080 + 440 = 25520
Step 59: 25520 + 440 = 25960
Step 60: 25960 + 440 = 26400

So, 440*60 = 26400