Alright, let's solve this math problem step by step. First, we have the number 400. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 303. So, we're going to take the number 400 and add it to itself 303 times.
Step 1: 0 + 400 = 400
Step 2: 400 + 400 = 800
Step 3: 800 + 400 = 1200
Step 4: 1200 + 400 = 1600
Step 5: 1600 + 400 = 2000
Step 6: 2000 + 400 = 2400
Step 7: 2400 + 400 = 2800
Step 8: 2800 + 400 = 3200
Step 9: 3200 + 400 = 3600
Step 10: 3600 + 400 = 4000
Step 11: 4000 + 400 = 4400
Step 12: 4400 + 400 = 4800
Step 13: 4800 + 400 = 5200
Step 14: 5200 + 400 = 5600
Step 15: 5600 + 400 = 6000
Step 16: 6000 + 400 = 6400
Step 17: 6400 + 400 = 6800
Step 18: 6800 + 400 = 7200
Step 19: 7200 + 400 = 7600
Step 20: 7600 + 400 = 8000
Step 21: 8000 + 400 = 8400
Step 22: 8400 + 400 = 8800
Step 23: 8800 + 400 = 9200
Step 24: 9200 + 400 = 9600
Step 25: 9600 + 400 = 10000
Step 26: 10000 + 400 = 10400
Step 27: 10400 + 400 = 10800
Step 28: 10800 + 400 = 11200
Step 29: 11200 + 400 = 11600
Step 30: 11600 + 400 = 12000
Step 31: 12000 + 400 = 12400
Step 32: 12400 + 400 = 12800
Step 33: 12800 + 400 = 13200
Step 34: 13200 + 400 = 13600
Step 35: 13600 + 400 = 14000
Step 36: 14000 + 400 = 14400
Step 37: 14400 + 400 = 14800
Step 38: 14800 + 400 = 15200
Step 39: 15200 + 400 = 15600
Step 40: 15600 + 400 = 16000
Step 41: 16000 + 400 = 16400
Step 42: 16400 + 400 = 16800
Step 43: 16800 + 400 = 17200
Step 44: 17200 + 400 = 17600
Step 45: 17600 + 400 = 18000
Step 46: 18000 + 400 = 18400
Step 47: 18400 + 400 = 18800
Step 48: 18800 + 400 = 19200
Step 49: 19200 + 400 = 19600
Step 50: 19600 + 400 = 20000
Step 51: 20000 + 400 = 20400
Step 52: 20400 + 400 = 20800
Step 53: 20800 + 400 = 21200
Step 54: 21200 + 400 = 21600
Step 55: 21600 + 400 = 22000
Step 56: 22000 + 400 = 22400
Step 57: 22400 + 400 = 22800
Step 58: 22800 + 400 = 23200
Step 59: 23200 + 400 = 23600
Step 60: 23600 + 400 = 24000
Step 61: 24000 + 400 = 24400
Step 62: 24400 + 400 = 24800
Step 63: 24800 + 400 = 25200
Step 64: 25200 + 400 = 25600
Step 65: 25600 + 400 = 26000
Step 66: 26000 + 400 = 26400
Step 67: 26400 + 400 = 26800
Step 68: 26800 + 400 = 27200
Step 69: 27200 + 400 = 27600
Step 70: 27600 + 400 = 28000
Step 71: 28000 + 400 = 28400
Step 72: 28400 + 400 = 28800
Step 73: 28800 + 400 = 29200
Step 74: 29200 + 400 = 29600
Step 75: 29600 + 400 = 30000
Step 76: 30000 + 400 = 30400
Step 77: 30400 + 400 = 30800
Step 78: 30800 + 400 = 31200
Step 79: 31200 + 400 = 31600
Step 80: 31600 + 400 = 32000
Step 81: 32000 + 400 = 32400
Step 82: 32400 + 400 = 32800
Step 83: 32800 + 400 = 33200
Step 84: 33200 + 400 = 33600
Step 85: 33600 + 400 = 34000
Step 86: 34000 + 400 = 34400
Step 87: 34400 + 400 = 34800
Step 88: 34800 + 400 = 35200
Step 89: 35200 + 400 = 35600
Step 90: 35600 + 400 = 36000
Step 91: 36000 + 400 = 36400
Step 92: 36400 + 400 = 36800
Step 93: 36800 + 400 = 37200
Step 94: 37200 + 400 = 37600
Step 95: 37600 + 400 = 38000
Step 96: 38000 + 400 = 38400
Step 97: 38400 + 400 = 38800
Step 98: 38800 + 400 = 39200
Step 99: 39200 + 400 = 39600
Step 100: 39600 + 400 = 40000
Step 101: 40000 + 400 = 40400
Step 102: 40400 + 400 = 40800
Step 103: 40800 + 400 = 41200
Step 104: 41200 + 400 = 41600
Step 105: 41600 + 400 = 42000
Step 106: 42000 + 400 = 42400
Step 107: 42400 + 400 = 42800
Step 108: 42800 + 400 = 43200
Step 109: 43200 + 400 = 43600
Step 110: 43600 + 400 = 44000
Step 111: 44000 + 400 = 44400
Step 112: 44400 + 400 = 44800
Step 113: 44800 + 400 = 45200
Step 114: 45200 + 400 = 45600
Step 115: 45600 + 400 = 46000
Step 116: 46000 + 400 = 46400
Step 117: 46400 + 400 = 46800
Step 118: 46800 + 400 = 47200
Step 119: 47200 + 400 = 47600
Step 120: 47600 + 400 = 48000
Step 121: 48000 + 400 = 48400
Step 122: 48400 + 400 = 48800
Step 123: 48800 + 400 = 49200
Step 124: 49200 + 400 = 49600
Step 125: 49600 + 400 = 50000
Step 126: 50000 + 400 = 50400
Step 127: 50400 + 400 = 50800
Step 128: 50800 + 400 = 51200
Step 129: 51200 + 400 = 51600
Step 130: 51600 + 400 = 52000
Step 131: 52000 + 400 = 52400
Step 132: 52400 + 400 = 52800
Step 133: 52800 + 400 = 53200
Step 134: 53200 + 400 = 53600
Step 135: 53600 + 400 = 54000
Step 136: 54000 + 400 = 54400
Step 137: 54400 + 400 = 54800
Step 138: 54800 + 400 = 55200
Step 139: 55200 + 400 = 55600
Step 140: 55600 + 400 = 56000
Step 141: 56000 + 400 = 56400
Step 142: 56400 + 400 = 56800
Step 143: 56800 + 400 = 57200
Step 144: 57200 + 400 = 57600
Step 145: 57600 + 400 = 58000
Step 146: 58000 + 400 = 58400
Step 147: 58400 + 400 = 58800
Step 148: 58800 + 400 = 59200
Step 149: 59200 + 400 = 59600
Step 150: 59600 + 400 = 60000
Step 151: 60000 + 400 = 60400
Step 152: 60400 + 400 = 60800
Step 153: 60800 + 400 = 61200
Step 154: 61200 + 400 = 61600
Step 155: 61600 + 400 = 62000
Step 156: 62000 + 400 = 62400
Step 157: 62400 + 400 = 62800
Step 158: 62800 + 400 = 63200
Step 159: 63200 + 400 = 63600
Step 160: 63600 + 400 = 64000
Step 161: 64000 + 400 = 64400
Step 162: 64400 + 400 = 64800
Step 163: 64800 + 400 = 65200
Step 164: 65200 + 400 = 65600
Step 165: 65600 + 400 = 66000
Step 166: 66000 + 400 = 66400
Step 167: 66400 + 400 = 66800
Step 168: 66800 + 400 = 67200
Step 169: 67200 + 400 = 67600
Step 170: 67600 + 400 = 68000
Step 171: 68000 + 400 = 68400
Step 172: 68400 + 400 = 68800
Step 173: 68800 + 400 = 69200
Step 174: 69200 + 400 = 69600
Step 175: 69600 + 400 = 70000
Step 176: 70000 + 400 = 70400
Step 177: 70400 + 400 = 70800
Step 178: 70800 + 400 = 71200
Step 179: 71200 + 400 = 71600
Step 180: 71600 + 400 = 72000
Step 181: 72000 + 400 = 72400
Step 182: 72400 + 400 = 72800
Step 183: 72800 + 400 = 73200
Step 184: 73200 + 400 = 73600
Step 185: 73600 + 400 = 74000
Step 186: 74000 + 400 = 74400
Step 187: 74400 + 400 = 74800
Step 188: 74800 + 400 = 75200
Step 189: 75200 + 400 = 75600
Step 190: 75600 + 400 = 76000
Step 191: 76000 + 400 = 76400
Step 192: 76400 + 400 = 76800
Step 193: 76800 + 400 = 77200
Step 194: 77200 + 400 = 77600
Step 195: 77600 + 400 = 78000
Step 196: 78000 + 400 = 78400
Step 197: 78400 + 400 = 78800
Step 198: 78800 + 400 = 79200
Step 199: 79200 + 400 = 79600
Step 200: 79600 + 400 = 80000
Step 201: 80000 + 400 = 80400
Step 202: 80400 + 400 = 80800
Step 203: 80800 + 400 = 81200
Step 204: 81200 + 400 = 81600
Step 205: 81600 + 400 = 82000
Step 206: 82000 + 400 = 82400
Step 207: 82400 + 400 = 82800
Step 208: 82800 + 400 = 83200
Step 209: 83200 + 400 = 83600
Step 210: 83600 + 400 = 84000
Step 211: 84000 + 400 = 84400
Step 212: 84400 + 400 = 84800
Step 213: 84800 + 400 = 85200
Step 214: 85200 + 400 = 85600
Step 215: 85600 + 400 = 86000
Step 216: 86000 + 400 = 86400
Step 217: 86400 + 400 = 86800
Step 218: 86800 + 400 = 87200
Step 219: 87200 + 400 = 87600
Step 220: 87600 + 400 = 88000
Step 221: 88000 + 400 = 88400
Step 222: 88400 + 400 = 88800
Step 223: 88800 + 400 = 89200
Step 224: 89200 + 400 = 89600
Step 225: 89600 + 400 = 90000
Step 226: 90000 + 400 = 90400
Step 227: 90400 + 400 = 90800
Step 228: 90800 + 400 = 91200
Step 229: 91200 + 400 = 91600
Step 230: 91600 + 400 = 92000
Step 231: 92000 + 400 = 92400
Step 232: 92400 + 400 = 92800
Step 233: 92800 + 400 = 93200
Step 234: 93200 + 400 = 93600
Step 235: 93600 + 400 = 94000
Step 236: 94000 + 400 = 94400
Step 237: 94400 + 400 = 94800
Step 238: 94800 + 400 = 95200
Step 239: 95200 + 400 = 95600
Step 240: 95600 + 400 = 96000
Step 241: 96000 + 400 = 96400
Step 242: 96400 + 400 = 96800
Step 243: 96800 + 400 = 97200
Step 244: 97200 + 400 = 97600
Step 245: 97600 + 400 = 98000
Step 246: 98000 + 400 = 98400
Step 247: 98400 + 400 = 98800
Step 248: 98800 + 400 = 99200
Step 249: 99200 + 400 = 99600
Step 250: 99600 + 400 = 100000
Step 251: 100000 + 400 = 100400
Step 252: 100400 + 400 = 100800
Step 253: 100800 + 400 = 101200
Step 254: 101200 + 400 = 101600
Step 255: 101600 + 400 = 102000
Step 256: 102000 + 400 = 102400
Step 257: 102400 + 400 = 102800
Step 258: 102800 + 400 = 103200
Step 259: 103200 + 400 = 103600
Step 260: 103600 + 400 = 104000
Step 261: 104000 + 400 = 104400
Step 262: 104400 + 400 = 104800
Step 263: 104800 + 400 = 105200
Step 264: 105200 + 400 = 105600
Step 265: 105600 + 400 = 106000
Step 266: 106000 + 400 = 106400
Step 267: 106400 + 400 = 106800
Step 268: 106800 + 400 = 107200
Step 269: 107200 + 400 = 107600
Step 270: 107600 + 400 = 108000
Step 271: 108000 + 400 = 108400
Step 272: 108400 + 400 = 108800
Step 273: 108800 + 400 = 109200
Step 274: 109200 + 400 = 109600
Step 275: 109600 + 400 = 110000
Step 276: 110000 + 400 = 110400
Step 277: 110400 + 400 = 110800
Step 278: 110800 + 400 = 111200
Step 279: 111200 + 400 = 111600
Step 280: 111600 + 400 = 112000
Step 281: 112000 + 400 = 112400
Step 282: 112400 + 400 = 112800
Step 283: 112800 + 400 = 113200
Step 284: 113200 + 400 = 113600
Step 285: 113600 + 400 = 114000
Step 286: 114000 + 400 = 114400
Step 287: 114400 + 400 = 114800
Step 288: 114800 + 400 = 115200
Step 289: 115200 + 400 = 115600
Step 290: 115600 + 400 = 116000
Step 291: 116000 + 400 = 116400
Step 292: 116400 + 400 = 116800
Step 293: 116800 + 400 = 117200
Step 294: 117200 + 400 = 117600
Step 295: 117600 + 400 = 118000
Step 296: 118000 + 400 = 118400
Step 297: 118400 + 400 = 118800
Step 298: 118800 + 400 = 119200
Step 299: 119200 + 400 = 119600
Step 300: 119600 + 400 = 120000
Step 301: 120000 + 400 = 120400
Step 302: 120400 + 400 = 120800
Step 303: 120800 + 400 = 121200

So, 400*303 = 121200