Alright, let's solve this math problem step by step. First, we have the number 75. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 210. So, we're going to take the number 75 and add it to itself 210 times.
Step 1: 0 + 75 = 75
Step 2: 75 + 75 = 150
Step 3: 150 + 75 = 225
Step 4: 225 + 75 = 300
Step 5: 300 + 75 = 375
Step 6: 375 + 75 = 450
Step 7: 450 + 75 = 525
Step 8: 525 + 75 = 600
Step 9: 600 + 75 = 675
Step 10: 675 + 75 = 750
Step 11: 750 + 75 = 825
Step 12: 825 + 75 = 900
Step 13: 900 + 75 = 975
Step 14: 975 + 75 = 1050
Step 15: 1050 + 75 = 1125
Step 16: 1125 + 75 = 1200
Step 17: 1200 + 75 = 1275
Step 18: 1275 + 75 = 1350
Step 19: 1350 + 75 = 1425
Step 20: 1425 + 75 = 1500
Step 21: 1500 + 75 = 1575
Step 22: 1575 + 75 = 1650
Step 23: 1650 + 75 = 1725
Step 24: 1725 + 75 = 1800
Step 25: 1800 + 75 = 1875
Step 26: 1875 + 75 = 1950
Step 27: 1950 + 75 = 2025
Step 28: 2025 + 75 = 2100
Step 29: 2100 + 75 = 2175
Step 30: 2175 + 75 = 2250
Step 31: 2250 + 75 = 2325
Step 32: 2325 + 75 = 2400
Step 33: 2400 + 75 = 2475
Step 34: 2475 + 75 = 2550
Step 35: 2550 + 75 = 2625
Step 36: 2625 + 75 = 2700
Step 37: 2700 + 75 = 2775
Step 38: 2775 + 75 = 2850
Step 39: 2850 + 75 = 2925
Step 40: 2925 + 75 = 3000
Step 41: 3000 + 75 = 3075
Step 42: 3075 + 75 = 3150
Step 43: 3150 + 75 = 3225
Step 44: 3225 + 75 = 3300
Step 45: 3300 + 75 = 3375
Step 46: 3375 + 75 = 3450
Step 47: 3450 + 75 = 3525
Step 48: 3525 + 75 = 3600
Step 49: 3600 + 75 = 3675
Step 50: 3675 + 75 = 3750
Step 51: 3750 + 75 = 3825
Step 52: 3825 + 75 = 3900
Step 53: 3900 + 75 = 3975
Step 54: 3975 + 75 = 4050
Step 55: 4050 + 75 = 4125
Step 56: 4125 + 75 = 4200
Step 57: 4200 + 75 = 4275
Step 58: 4275 + 75 = 4350
Step 59: 4350 + 75 = 4425
Step 60: 4425 + 75 = 4500
Step 61: 4500 + 75 = 4575
Step 62: 4575 + 75 = 4650
Step 63: 4650 + 75 = 4725
Step 64: 4725 + 75 = 4800
Step 65: 4800 + 75 = 4875
Step 66: 4875 + 75 = 4950
Step 67: 4950 + 75 = 5025
Step 68: 5025 + 75 = 5100
Step 69: 5100 + 75 = 5175
Step 70: 5175 + 75 = 5250
Step 71: 5250 + 75 = 5325
Step 72: 5325 + 75 = 5400
Step 73: 5400 + 75 = 5475
Step 74: 5475 + 75 = 5550
Step 75: 5550 + 75 = 5625
Step 76: 5625 + 75 = 5700
Step 77: 5700 + 75 = 5775
Step 78: 5775 + 75 = 5850
Step 79: 5850 + 75 = 5925
Step 80: 5925 + 75 = 6000
Step 81: 6000 + 75 = 6075
Step 82: 6075 + 75 = 6150
Step 83: 6150 + 75 = 6225
Step 84: 6225 + 75 = 6300
Step 85: 6300 + 75 = 6375
Step 86: 6375 + 75 = 6450
Step 87: 6450 + 75 = 6525
Step 88: 6525 + 75 = 6600
Step 89: 6600 + 75 = 6675
Step 90: 6675 + 75 = 6750
Step 91: 6750 + 75 = 6825
Step 92: 6825 + 75 = 6900
Step 93: 6900 + 75 = 6975
Step 94: 6975 + 75 = 7050
Step 95: 7050 + 75 = 7125
Step 96: 7125 + 75 = 7200
Step 97: 7200 + 75 = 7275
Step 98: 7275 + 75 = 7350
Step 99: 7350 + 75 = 7425
Step 100: 7425 + 75 = 7500
Step 101: 7500 + 75 = 7575
Step 102: 7575 + 75 = 7650
Step 103: 7650 + 75 = 7725
Step 104: 7725 + 75 = 7800
Step 105: 7800 + 75 = 7875
Step 106: 7875 + 75 = 7950
Step 107: 7950 + 75 = 8025
Step 108: 8025 + 75 = 8100
Step 109: 8100 + 75 = 8175
Step 110: 8175 + 75 = 8250
Step 111: 8250 + 75 = 8325
Step 112: 8325 + 75 = 8400
Step 113: 8400 + 75 = 8475
Step 114: 8475 + 75 = 8550
Step 115: 8550 + 75 = 8625
Step 116: 8625 + 75 = 8700
Step 117: 8700 + 75 = 8775
Step 118: 8775 + 75 = 8850
Step 119: 8850 + 75 = 8925
Step 120: 8925 + 75 = 9000
Step 121: 9000 + 75 = 9075
Step 122: 9075 + 75 = 9150
Step 123: 9150 + 75 = 9225
Step 124: 9225 + 75 = 9300
Step 125: 9300 + 75 = 9375
Step 126: 9375 + 75 = 9450
Step 127: 9450 + 75 = 9525
Step 128: 9525 + 75 = 9600
Step 129: 9600 + 75 = 9675
Step 130: 9675 + 75 = 9750
Step 131: 9750 + 75 = 9825
Step 132: 9825 + 75 = 9900
Step 133: 9900 + 75 = 9975
Step 134: 9975 + 75 = 10050
Step 135: 10050 + 75 = 10125
Step 136: 10125 + 75 = 10200
Step 137: 10200 + 75 = 10275
Step 138: 10275 + 75 = 10350
Step 139: 10350 + 75 = 10425
Step 140: 10425 + 75 = 10500
Step 141: 10500 + 75 = 10575
Step 142: 10575 + 75 = 10650
Step 143: 10650 + 75 = 10725
Step 144: 10725 + 75 = 10800
Step 145: 10800 + 75 = 10875
Step 146: 10875 + 75 = 10950
Step 147: 10950 + 75 = 11025
Step 148: 11025 + 75 = 11100
Step 149: 11100 + 75 = 11175
Step 150: 11175 + 75 = 11250
Step 151: 11250 + 75 = 11325
Step 152: 11325 + 75 = 11400
Step 153: 11400 + 75 = 11475
Step 154: 11475 + 75 = 11550
Step 155: 11550 + 75 = 11625
Step 156: 11625 + 75 = 11700
Step 157: 11700 + 75 = 11775
Step 158: 11775 + 75 = 11850
Step 159: 11850 + 75 = 11925
Step 160: 11925 + 75 = 12000
Step 161: 12000 + 75 = 12075
Step 162: 12075 + 75 = 12150
Step 163: 12150 + 75 = 12225
Step 164: 12225 + 75 = 12300
Step 165: 12300 + 75 = 12375
Step 166: 12375 + 75 = 12450
Step 167: 12450 + 75 = 12525
Step 168: 12525 + 75 = 12600
Step 169: 12600 + 75 = 12675
Step 170: 12675 + 75 = 12750
Step 171: 12750 + 75 = 12825
Step 172: 12825 + 75 = 12900
Step 173: 12900 + 75 = 12975
Step 174: 12975 + 75 = 13050
Step 175: 13050 + 75 = 13125
Step 176: 13125 + 75 = 13200
Step 177: 13200 + 75 = 13275
Step 178: 13275 + 75 = 13350
Step 179: 13350 + 75 = 13425
Step 180: 13425 + 75 = 13500
Step 181: 13500 + 75 = 13575
Step 182: 13575 + 75 = 13650
Step 183: 13650 + 75 = 13725
Step 184: 13725 + 75 = 13800
Step 185: 13800 + 75 = 13875
Step 186: 13875 + 75 = 13950
Step 187: 13950 + 75 = 14025
Step 188: 14025 + 75 = 14100
Step 189: 14100 + 75 = 14175
Step 190: 14175 + 75 = 14250
Step 191: 14250 + 75 = 14325
Step 192: 14325 + 75 = 14400
Step 193: 14400 + 75 = 14475
Step 194: 14475 + 75 = 14550
Step 195: 14550 + 75 = 14625
Step 196: 14625 + 75 = 14700
Step 197: 14700 + 75 = 14775
Step 198: 14775 + 75 = 14850
Step 199: 14850 + 75 = 14925
Step 200: 14925 + 75 = 15000
Step 201: 15000 + 75 = 15075
Step 202: 15075 + 75 = 15150
Step 203: 15150 + 75 = 15225
Step 204: 15225 + 75 = 15300
Step 205: 15300 + 75 = 15375
Step 206: 15375 + 75 = 15450
Step 207: 15450 + 75 = 15525
Step 208: 15525 + 75 = 15600
Step 209: 15600 + 75 = 15675
Step 210: 15675 + 75 = 15750

So, 75*210 = 15750