OK, let's crack this. We're given 350 and our task is to multiply it by 342. Essentially, we'll be adding 350 to itself 342 times.
Step 1: 0 + 350 = 350
Step 2: 350 + 350 = 700
Step 3: 700 + 350 = 1050
Step 4: 1050 + 350 = 1400
Step 5: 1400 + 350 = 1750
Step 6: 1750 + 350 = 2100
Step 7: 2100 + 350 = 2450
Step 8: 2450 + 350 = 2800
Step 9: 2800 + 350 = 3150
Step 10: 3150 + 350 = 3500
Step 11: 3500 + 350 = 3850
Step 12: 3850 + 350 = 4200
Step 13: 4200 + 350 = 4550
Step 14: 4550 + 350 = 4900
Step 15: 4900 + 350 = 5250
Step 16: 5250 + 350 = 5600
Step 17: 5600 + 350 = 5950
Step 18: 5950 + 350 = 6300
Step 19: 6300 + 350 = 6650
Step 20: 6650 + 350 = 7000
Step 21: 7000 + 350 = 7350
Step 22: 7350 + 350 = 7700
Step 23: 7700 + 350 = 8050
Step 24: 8050 + 350 = 8400
Step 25: 8400 + 350 = 8750
Step 26: 8750 + 350 = 9100
Step 27: 9100 + 350 = 9450
Step 28: 9450 + 350 = 9800
Step 29: 9800 + 350 = 10150
Step 30: 10150 + 350 = 10500
Step 31: 10500 + 350 = 10850
Step 32: 10850 + 350 = 11200
Step 33: 11200 + 350 = 11550
Step 34: 11550 + 350 = 11900
Step 35: 11900 + 350 = 12250
Step 36: 12250 + 350 = 12600
Step 37: 12600 + 350 = 12950
Step 38: 12950 + 350 = 13300
Step 39: 13300 + 350 = 13650
Step 40: 13650 + 350 = 14000
Step 41: 14000 + 350 = 14350
Step 42: 14350 + 350 = 14700
Step 43: 14700 + 350 = 15050
Step 44: 15050 + 350 = 15400
Step 45: 15400 + 350 = 15750
Step 46: 15750 + 350 = 16100
Step 47: 16100 + 350 = 16450
Step 48: 16450 + 350 = 16800
Step 49: 16800 + 350 = 17150
Step 50: 17150 + 350 = 17500
Step 51: 17500 + 350 = 17850
Step 52: 17850 + 350 = 18200
Step 53: 18200 + 350 = 18550
Step 54: 18550 + 350 = 18900
Step 55: 18900 + 350 = 19250
Step 56: 19250 + 350 = 19600
Step 57: 19600 + 350 = 19950
Step 58: 19950 + 350 = 20300
Step 59: 20300 + 350 = 20650
Step 60: 20650 + 350 = 21000
Step 61: 21000 + 350 = 21350
Step 62: 21350 + 350 = 21700
Step 63: 21700 + 350 = 22050
Step 64: 22050 + 350 = 22400
Step 65: 22400 + 350 = 22750
Step 66: 22750 + 350 = 23100
Step 67: 23100 + 350 = 23450
Step 68: 23450 + 350 = 23800
Step 69: 23800 + 350 = 24150
Step 70: 24150 + 350 = 24500
Step 71: 24500 + 350 = 24850
Step 72: 24850 + 350 = 25200
Step 73: 25200 + 350 = 25550
Step 74: 25550 + 350 = 25900
Step 75: 25900 + 350 = 26250
Step 76: 26250 + 350 = 26600
Step 77: 26600 + 350 = 26950
Step 78: 26950 + 350 = 27300
Step 79: 27300 + 350 = 27650
Step 80: 27650 + 350 = 28000
Step 81: 28000 + 350 = 28350
Step 82: 28350 + 350 = 28700
Step 83: 28700 + 350 = 29050
Step 84: 29050 + 350 = 29400
Step 85: 29400 + 350 = 29750
Step 86: 29750 + 350 = 30100
Step 87: 30100 + 350 = 30450
Step 88: 30450 + 350 = 30800
Step 89: 30800 + 350 = 31150
Step 90: 31150 + 350 = 31500
Step 91: 31500 + 350 = 31850
Step 92: 31850 + 350 = 32200
Step 93: 32200 + 350 = 32550
Step 94: 32550 + 350 = 32900
Step 95: 32900 + 350 = 33250
Step 96: 33250 + 350 = 33600
Step 97: 33600 + 350 = 33950
Step 98: 33950 + 350 = 34300
Step 99: 34300 + 350 = 34650
Step 100: 34650 + 350 = 35000
Step 101: 35000 + 350 = 35350
Step 102: 35350 + 350 = 35700
Step 103: 35700 + 350 = 36050
Step 104: 36050 + 350 = 36400
Step 105: 36400 + 350 = 36750
Step 106: 36750 + 350 = 37100
Step 107: 37100 + 350 = 37450
Step 108: 37450 + 350 = 37800
Step 109: 37800 + 350 = 38150
Step 110: 38150 + 350 = 38500
Step 111: 38500 + 350 = 38850
Step 112: 38850 + 350 = 39200
Step 113: 39200 + 350 = 39550
Step 114: 39550 + 350 = 39900
Step 115: 39900 + 350 = 40250
Step 116: 40250 + 350 = 40600
Step 117: 40600 + 350 = 40950
Step 118: 40950 + 350 = 41300
Step 119: 41300 + 350 = 41650
Step 120: 41650 + 350 = 42000
Step 121: 42000 + 350 = 42350
Step 122: 42350 + 350 = 42700
Step 123: 42700 + 350 = 43050
Step 124: 43050 + 350 = 43400
Step 125: 43400 + 350 = 43750
Step 126: 43750 + 350 = 44100
Step 127: 44100 + 350 = 44450
Step 128: 44450 + 350 = 44800
Step 129: 44800 + 350 = 45150
Step 130: 45150 + 350 = 45500
Step 131: 45500 + 350 = 45850
Step 132: 45850 + 350 = 46200
Step 133: 46200 + 350 = 46550
Step 134: 46550 + 350 = 46900
Step 135: 46900 + 350 = 47250
Step 136: 47250 + 350 = 47600
Step 137: 47600 + 350 = 47950
Step 138: 47950 + 350 = 48300
Step 139: 48300 + 350 = 48650
Step 140: 48650 + 350 = 49000
Step 141: 49000 + 350 = 49350
Step 142: 49350 + 350 = 49700
Step 143: 49700 + 350 = 50050
Step 144: 50050 + 350 = 50400
Step 145: 50400 + 350 = 50750
Step 146: 50750 + 350 = 51100
Step 147: 51100 + 350 = 51450
Step 148: 51450 + 350 = 51800
Step 149: 51800 + 350 = 52150
Step 150: 52150 + 350 = 52500
Step 151: 52500 + 350 = 52850
Step 152: 52850 + 350 = 53200
Step 153: 53200 + 350 = 53550
Step 154: 53550 + 350 = 53900
Step 155: 53900 + 350 = 54250
Step 156: 54250 + 350 = 54600
Step 157: 54600 + 350 = 54950
Step 158: 54950 + 350 = 55300
Step 159: 55300 + 350 = 55650
Step 160: 55650 + 350 = 56000
Step 161: 56000 + 350 = 56350
Step 162: 56350 + 350 = 56700
Step 163: 56700 + 350 = 57050
Step 164: 57050 + 350 = 57400
Step 165: 57400 + 350 = 57750
Step 166: 57750 + 350 = 58100
Step 167: 58100 + 350 = 58450
Step 168: 58450 + 350 = 58800
Step 169: 58800 + 350 = 59150
Step 170: 59150 + 350 = 59500
Step 171: 59500 + 350 = 59850
Step 172: 59850 + 350 = 60200
Step 173: 60200 + 350 = 60550
Step 174: 60550 + 350 = 60900
Step 175: 60900 + 350 = 61250
Step 176: 61250 + 350 = 61600
Step 177: 61600 + 350 = 61950
Step 178: 61950 + 350 = 62300
Step 179: 62300 + 350 = 62650
Step 180: 62650 + 350 = 63000
Step 181: 63000 + 350 = 63350
Step 182: 63350 + 350 = 63700
Step 183: 63700 + 350 = 64050
Step 184: 64050 + 350 = 64400
Step 185: 64400 + 350 = 64750
Step 186: 64750 + 350 = 65100
Step 187: 65100 + 350 = 65450
Step 188: 65450 + 350 = 65800
Step 189: 65800 + 350 = 66150
Step 190: 66150 + 350 = 66500
Step 191: 66500 + 350 = 66850
Step 192: 66850 + 350 = 67200
Step 193: 67200 + 350 = 67550
Step 194: 67550 + 350 = 67900
Step 195: 67900 + 350 = 68250
Step 196: 68250 + 350 = 68600
Step 197: 68600 + 350 = 68950
Step 198: 68950 + 350 = 69300
Step 199: 69300 + 350 = 69650
Step 200: 69650 + 350 = 70000
Step 201: 70000 + 350 = 70350
Step 202: 70350 + 350 = 70700
Step 203: 70700 + 350 = 71050
Step 204: 71050 + 350 = 71400
Step 205: 71400 + 350 = 71750
Step 206: 71750 + 350 = 72100
Step 207: 72100 + 350 = 72450
Step 208: 72450 + 350 = 72800
Step 209: 72800 + 350 = 73150
Step 210: 73150 + 350 = 73500
Step 211: 73500 + 350 = 73850
Step 212: 73850 + 350 = 74200
Step 213: 74200 + 350 = 74550
Step 214: 74550 + 350 = 74900
Step 215: 74900 + 350 = 75250
Step 216: 75250 + 350 = 75600
Step 217: 75600 + 350 = 75950
Step 218: 75950 + 350 = 76300
Step 219: 76300 + 350 = 76650
Step 220: 76650 + 350 = 77000
Step 221: 77000 + 350 = 77350
Step 222: 77350 + 350 = 77700
Step 223: 77700 + 350 = 78050
Step 224: 78050 + 350 = 78400
Step 225: 78400 + 350 = 78750
Step 226: 78750 + 350 = 79100
Step 227: 79100 + 350 = 79450
Step 228: 79450 + 350 = 79800
Step 229: 79800 + 350 = 80150
Step 230: 80150 + 350 = 80500
Step 231: 80500 + 350 = 80850
Step 232: 80850 + 350 = 81200
Step 233: 81200 + 350 = 81550
Step 234: 81550 + 350 = 81900
Step 235: 81900 + 350 = 82250
Step 236: 82250 + 350 = 82600
Step 237: 82600 + 350 = 82950
Step 238: 82950 + 350 = 83300
Step 239: 83300 + 350 = 83650
Step 240: 83650 + 350 = 84000
Step 241: 84000 + 350 = 84350
Step 242: 84350 + 350 = 84700
Step 243: 84700 + 350 = 85050
Step 244: 85050 + 350 = 85400
Step 245: 85400 + 350 = 85750
Step 246: 85750 + 350 = 86100
Step 247: 86100 + 350 = 86450
Step 248: 86450 + 350 = 86800
Step 249: 86800 + 350 = 87150
Step 250: 87150 + 350 = 87500
Step 251: 87500 + 350 = 87850
Step 252: 87850 + 350 = 88200
Step 253: 88200 + 350 = 88550
Step 254: 88550 + 350 = 88900
Step 255: 88900 + 350 = 89250
Step 256: 89250 + 350 = 89600
Step 257: 89600 + 350 = 89950
Step 258: 89950 + 350 = 90300
Step 259: 90300 + 350 = 90650
Step 260: 90650 + 350 = 91000
Step 261: 91000 + 350 = 91350
Step 262: 91350 + 350 = 91700
Step 263: 91700 + 350 = 92050
Step 264: 92050 + 350 = 92400
Step 265: 92400 + 350 = 92750
Step 266: 92750 + 350 = 93100
Step 267: 93100 + 350 = 93450
Step 268: 93450 + 350 = 93800
Step 269: 93800 + 350 = 94150
Step 270: 94150 + 350 = 94500
Step 271: 94500 + 350 = 94850
Step 272: 94850 + 350 = 95200
Step 273: 95200 + 350 = 95550
Step 274: 95550 + 350 = 95900
Step 275: 95900 + 350 = 96250
Step 276: 96250 + 350 = 96600
Step 277: 96600 + 350 = 96950
Step 278: 96950 + 350 = 97300
Step 279: 97300 + 350 = 97650
Step 280: 97650 + 350 = 98000
Step 281: 98000 + 350 = 98350
Step 282: 98350 + 350 = 98700
Step 283: 98700 + 350 = 99050
Step 284: 99050 + 350 = 99400
Step 285: 99400 + 350 = 99750
Step 286: 99750 + 350 = 100100
Step 287: 100100 + 350 = 100450
Step 288: 100450 + 350 = 100800
Step 289: 100800 + 350 = 101150
Step 290: 101150 + 350 = 101500
Step 291: 101500 + 350 = 101850
Step 292: 101850 + 350 = 102200
Step 293: 102200 + 350 = 102550
Step 294: 102550 + 350 = 102900
Step 295: 102900 + 350 = 103250
Step 296: 103250 + 350 = 103600
Step 297: 103600 + 350 = 103950
Step 298: 103950 + 350 = 104300
Step 299: 104300 + 350 = 104650
Step 300: 104650 + 350 = 105000
Step 301: 105000 + 350 = 105350
Step 302: 105350 + 350 = 105700
Step 303: 105700 + 350 = 106050
Step 304: 106050 + 350 = 106400
Step 305: 106400 + 350 = 106750
Step 306: 106750 + 350 = 107100
Step 307: 107100 + 350 = 107450
Step 308: 107450 + 350 = 107800
Step 309: 107800 + 350 = 108150
Step 310: 108150 + 350 = 108500
Step 311: 108500 + 350 = 108850
Step 312: 108850 + 350 = 109200
Step 313: 109200 + 350 = 109550
Step 314: 109550 + 350 = 109900
Step 315: 109900 + 350 = 110250
Step 316: 110250 + 350 = 110600
Step 317: 110600 + 350 = 110950
Step 318: 110950 + 350 = 111300
Step 319: 111300 + 350 = 111650
Step 320: 111650 + 350 = 112000
Step 321: 112000 + 350 = 112350
Step 322: 112350 + 350 = 112700
Step 323: 112700 + 350 = 113050
Step 324: 113050 + 350 = 113400
Step 325: 113400 + 350 = 113750
Step 326: 113750 + 350 = 114100
Step 327: 114100 + 350 = 114450
Step 328: 114450 + 350 = 114800
Step 329: 114800 + 350 = 115150
Step 330: 115150 + 350 = 115500
Step 331: 115500 + 350 = 115850
Step 332: 115850 + 350 = 116200
Step 333: 116200 + 350 = 116550
Step 334: 116550 + 350 = 116900
Step 335: 116900 + 350 = 117250
Step 336: 117250 + 350 = 117600
Step 337: 117600 + 350 = 117950
Step 338: 117950 + 350 = 118300
Step 339: 118300 + 350 = 118650
Step 340: 118650 + 350 = 119000
Step 341: 119000 + 350 = 119350
Step 342: 119350 + 350 = 119700

So, 350*342 = 119700