Alright, let's solve this math problem step by step. First, we have the number 280. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 157. So, we're going to take the number 280 and add it to itself 157 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
Step 136: 37800 + 280 = 38080
Step 137: 38080 + 280 = 38360
Step 138: 38360 + 280 = 38640
Step 139: 38640 + 280 = 38920
Step 140: 38920 + 280 = 39200
Step 141: 39200 + 280 = 39480
Step 142: 39480 + 280 = 39760
Step 143: 39760 + 280 = 40040
Step 144: 40040 + 280 = 40320
Step 145: 40320 + 280 = 40600
Step 146: 40600 + 280 = 40880
Step 147: 40880 + 280 = 41160
Step 148: 41160 + 280 = 41440
Step 149: 41440 + 280 = 41720
Step 150: 41720 + 280 = 42000
Step 151: 42000 + 280 = 42280
Step 152: 42280 + 280 = 42560
Step 153: 42560 + 280 = 42840
Step 154: 42840 + 280 = 43120
Step 155: 43120 + 280 = 43400
Step 156: 43400 + 280 = 43680
Step 157: 43680 + 280 = 43960

So, 280*157 = 43960