Sure thing! We've got 280 and we're gonna multiply it by 135. That's the same as adding 280 to itself 135 times.
Step 1: 0 + 280 = 280
Step 2: 280 + 280 = 560
Step 3: 560 + 280 = 840
Step 4: 840 + 280 = 1120
Step 5: 1120 + 280 = 1400
Step 6: 1400 + 280 = 1680
Step 7: 1680 + 280 = 1960
Step 8: 1960 + 280 = 2240
Step 9: 2240 + 280 = 2520
Step 10: 2520 + 280 = 2800
Step 11: 2800 + 280 = 3080
Step 12: 3080 + 280 = 3360
Step 13: 3360 + 280 = 3640
Step 14: 3640 + 280 = 3920
Step 15: 3920 + 280 = 4200
Step 16: 4200 + 280 = 4480
Step 17: 4480 + 280 = 4760
Step 18: 4760 + 280 = 5040
Step 19: 5040 + 280 = 5320
Step 20: 5320 + 280 = 5600
Step 21: 5600 + 280 = 5880
Step 22: 5880 + 280 = 6160
Step 23: 6160 + 280 = 6440
Step 24: 6440 + 280 = 6720
Step 25: 6720 + 280 = 7000
Step 26: 7000 + 280 = 7280
Step 27: 7280 + 280 = 7560
Step 28: 7560 + 280 = 7840
Step 29: 7840 + 280 = 8120
Step 30: 8120 + 280 = 8400
Step 31: 8400 + 280 = 8680
Step 32: 8680 + 280 = 8960
Step 33: 8960 + 280 = 9240
Step 34: 9240 + 280 = 9520
Step 35: 9520 + 280 = 9800
Step 36: 9800 + 280 = 10080
Step 37: 10080 + 280 = 10360
Step 38: 10360 + 280 = 10640
Step 39: 10640 + 280 = 10920
Step 40: 10920 + 280 = 11200
Step 41: 11200 + 280 = 11480
Step 42: 11480 + 280 = 11760
Step 43: 11760 + 280 = 12040
Step 44: 12040 + 280 = 12320
Step 45: 12320 + 280 = 12600
Step 46: 12600 + 280 = 12880
Step 47: 12880 + 280 = 13160
Step 48: 13160 + 280 = 13440
Step 49: 13440 + 280 = 13720
Step 50: 13720 + 280 = 14000
Step 51: 14000 + 280 = 14280
Step 52: 14280 + 280 = 14560
Step 53: 14560 + 280 = 14840
Step 54: 14840 + 280 = 15120
Step 55: 15120 + 280 = 15400
Step 56: 15400 + 280 = 15680
Step 57: 15680 + 280 = 15960
Step 58: 15960 + 280 = 16240
Step 59: 16240 + 280 = 16520
Step 60: 16520 + 280 = 16800
Step 61: 16800 + 280 = 17080
Step 62: 17080 + 280 = 17360
Step 63: 17360 + 280 = 17640
Step 64: 17640 + 280 = 17920
Step 65: 17920 + 280 = 18200
Step 66: 18200 + 280 = 18480
Step 67: 18480 + 280 = 18760
Step 68: 18760 + 280 = 19040
Step 69: 19040 + 280 = 19320
Step 70: 19320 + 280 = 19600
Step 71: 19600 + 280 = 19880
Step 72: 19880 + 280 = 20160
Step 73: 20160 + 280 = 20440
Step 74: 20440 + 280 = 20720
Step 75: 20720 + 280 = 21000
Step 76: 21000 + 280 = 21280
Step 77: 21280 + 280 = 21560
Step 78: 21560 + 280 = 21840
Step 79: 21840 + 280 = 22120
Step 80: 22120 + 280 = 22400
Step 81: 22400 + 280 = 22680
Step 82: 22680 + 280 = 22960
Step 83: 22960 + 280 = 23240
Step 84: 23240 + 280 = 23520
Step 85: 23520 + 280 = 23800
Step 86: 23800 + 280 = 24080
Step 87: 24080 + 280 = 24360
Step 88: 24360 + 280 = 24640
Step 89: 24640 + 280 = 24920
Step 90: 24920 + 280 = 25200
Step 91: 25200 + 280 = 25480
Step 92: 25480 + 280 = 25760
Step 93: 25760 + 280 = 26040
Step 94: 26040 + 280 = 26320
Step 95: 26320 + 280 = 26600
Step 96: 26600 + 280 = 26880
Step 97: 26880 + 280 = 27160
Step 98: 27160 + 280 = 27440
Step 99: 27440 + 280 = 27720
Step 100: 27720 + 280 = 28000
Step 101: 28000 + 280 = 28280
Step 102: 28280 + 280 = 28560
Step 103: 28560 + 280 = 28840
Step 104: 28840 + 280 = 29120
Step 105: 29120 + 280 = 29400
Step 106: 29400 + 280 = 29680
Step 107: 29680 + 280 = 29960
Step 108: 29960 + 280 = 30240
Step 109: 30240 + 280 = 30520
Step 110: 30520 + 280 = 30800
Step 111: 30800 + 280 = 31080
Step 112: 31080 + 280 = 31360
Step 113: 31360 + 280 = 31640
Step 114: 31640 + 280 = 31920
Step 115: 31920 + 280 = 32200
Step 116: 32200 + 280 = 32480
Step 117: 32480 + 280 = 32760
Step 118: 32760 + 280 = 33040
Step 119: 33040 + 280 = 33320
Step 120: 33320 + 280 = 33600
Step 121: 33600 + 280 = 33880
Step 122: 33880 + 280 = 34160
Step 123: 34160 + 280 = 34440
Step 124: 34440 + 280 = 34720
Step 125: 34720 + 280 = 35000
Step 126: 35000 + 280 = 35280
Step 127: 35280 + 280 = 35560
Step 128: 35560 + 280 = 35840
Step 129: 35840 + 280 = 36120
Step 130: 36120 + 280 = 36400
Step 131: 36400 + 280 = 36680
Step 132: 36680 + 280 = 36960
Step 133: 36960 + 280 = 37240
Step 134: 37240 + 280 = 37520
Step 135: 37520 + 280 = 37800

So, 280*135 = 37800