Alright, let's solve this math problem step by step. First, we have the number 375. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 139. So, we're going to take the number 375 and add it to itself 139 times.
Step 1: 0 + 375 = 375
Step 2: 375 + 375 = 750
Step 3: 750 + 375 = 1125
Step 4: 1125 + 375 = 1500
Step 5: 1500 + 375 = 1875
Step 6: 1875 + 375 = 2250
Step 7: 2250 + 375 = 2625
Step 8: 2625 + 375 = 3000
Step 9: 3000 + 375 = 3375
Step 10: 3375 + 375 = 3750
Step 11: 3750 + 375 = 4125
Step 12: 4125 + 375 = 4500
Step 13: 4500 + 375 = 4875
Step 14: 4875 + 375 = 5250
Step 15: 5250 + 375 = 5625
Step 16: 5625 + 375 = 6000
Step 17: 6000 + 375 = 6375
Step 18: 6375 + 375 = 6750
Step 19: 6750 + 375 = 7125
Step 20: 7125 + 375 = 7500
Step 21: 7500 + 375 = 7875
Step 22: 7875 + 375 = 8250
Step 23: 8250 + 375 = 8625
Step 24: 8625 + 375 = 9000
Step 25: 9000 + 375 = 9375
Step 26: 9375 + 375 = 9750
Step 27: 9750 + 375 = 10125
Step 28: 10125 + 375 = 10500
Step 29: 10500 + 375 = 10875
Step 30: 10875 + 375 = 11250
Step 31: 11250 + 375 = 11625
Step 32: 11625 + 375 = 12000
Step 33: 12000 + 375 = 12375
Step 34: 12375 + 375 = 12750
Step 35: 12750 + 375 = 13125
Step 36: 13125 + 375 = 13500
Step 37: 13500 + 375 = 13875
Step 38: 13875 + 375 = 14250
Step 39: 14250 + 375 = 14625
Step 40: 14625 + 375 = 15000
Step 41: 15000 + 375 = 15375
Step 42: 15375 + 375 = 15750
Step 43: 15750 + 375 = 16125
Step 44: 16125 + 375 = 16500
Step 45: 16500 + 375 = 16875
Step 46: 16875 + 375 = 17250
Step 47: 17250 + 375 = 17625
Step 48: 17625 + 375 = 18000
Step 49: 18000 + 375 = 18375
Step 50: 18375 + 375 = 18750
Step 51: 18750 + 375 = 19125
Step 52: 19125 + 375 = 19500
Step 53: 19500 + 375 = 19875
Step 54: 19875 + 375 = 20250
Step 55: 20250 + 375 = 20625
Step 56: 20625 + 375 = 21000
Step 57: 21000 + 375 = 21375
Step 58: 21375 + 375 = 21750
Step 59: 21750 + 375 = 22125
Step 60: 22125 + 375 = 22500
Step 61: 22500 + 375 = 22875
Step 62: 22875 + 375 = 23250
Step 63: 23250 + 375 = 23625
Step 64: 23625 + 375 = 24000
Step 65: 24000 + 375 = 24375
Step 66: 24375 + 375 = 24750
Step 67: 24750 + 375 = 25125
Step 68: 25125 + 375 = 25500
Step 69: 25500 + 375 = 25875
Step 70: 25875 + 375 = 26250
Step 71: 26250 + 375 = 26625
Step 72: 26625 + 375 = 27000
Step 73: 27000 + 375 = 27375
Step 74: 27375 + 375 = 27750
Step 75: 27750 + 375 = 28125
Step 76: 28125 + 375 = 28500
Step 77: 28500 + 375 = 28875
Step 78: 28875 + 375 = 29250
Step 79: 29250 + 375 = 29625
Step 80: 29625 + 375 = 30000
Step 81: 30000 + 375 = 30375
Step 82: 30375 + 375 = 30750
Step 83: 30750 + 375 = 31125
Step 84: 31125 + 375 = 31500
Step 85: 31500 + 375 = 31875
Step 86: 31875 + 375 = 32250
Step 87: 32250 + 375 = 32625
Step 88: 32625 + 375 = 33000
Step 89: 33000 + 375 = 33375
Step 90: 33375 + 375 = 33750
Step 91: 33750 + 375 = 34125
Step 92: 34125 + 375 = 34500
Step 93: 34500 + 375 = 34875
Step 94: 34875 + 375 = 35250
Step 95: 35250 + 375 = 35625
Step 96: 35625 + 375 = 36000
Step 97: 36000 + 375 = 36375
Step 98: 36375 + 375 = 36750
Step 99: 36750 + 375 = 37125
Step 100: 37125 + 375 = 37500
Step 101: 37500 + 375 = 37875
Step 102: 37875 + 375 = 38250
Step 103: 38250 + 375 = 38625
Step 104: 38625 + 375 = 39000
Step 105: 39000 + 375 = 39375
Step 106: 39375 + 375 = 39750
Step 107: 39750 + 375 = 40125
Step 108: 40125 + 375 = 40500
Step 109: 40500 + 375 = 40875
Step 110: 40875 + 375 = 41250
Step 111: 41250 + 375 = 41625
Step 112: 41625 + 375 = 42000
Step 113: 42000 + 375 = 42375
Step 114: 42375 + 375 = 42750
Step 115: 42750 + 375 = 43125
Step 116: 43125 + 375 = 43500
Step 117: 43500 + 375 = 43875
Step 118: 43875 + 375 = 44250
Step 119: 44250 + 375 = 44625
Step 120: 44625 + 375 = 45000
Step 121: 45000 + 375 = 45375
Step 122: 45375 + 375 = 45750
Step 123: 45750 + 375 = 46125
Step 124: 46125 + 375 = 46500
Step 125: 46500 + 375 = 46875
Step 126: 46875 + 375 = 47250
Step 127: 47250 + 375 = 47625
Step 128: 47625 + 375 = 48000
Step 129: 48000 + 375 = 48375
Step 130: 48375 + 375 = 48750
Step 131: 48750 + 375 = 49125
Step 132: 49125 + 375 = 49500
Step 133: 49500 + 375 = 49875
Step 134: 49875 + 375 = 50250
Step 135: 50250 + 375 = 50625
Step 136: 50625 + 375 = 51000
Step 137: 51000 + 375 = 51375
Step 138: 51375 + 375 = 51750
Step 139: 51750 + 375 = 52125

So, 375*139 = 52125