OK, let's crack this. We're given 311 and our task is to multiply it by 49. Essentially, we'll be adding 311 to itself 49 times.
Step 1: 0 + 311 = 311
Step 2: 311 + 311 = 622
Step 3: 622 + 311 = 933
Step 4: 933 + 311 = 1244
Step 5: 1244 + 311 = 1555
Step 6: 1555 + 311 = 1866
Step 7: 1866 + 311 = 2177
Step 8: 2177 + 311 = 2488
Step 9: 2488 + 311 = 2799
Step 10: 2799 + 311 = 3110
Step 11: 3110 + 311 = 3421
Step 12: 3421 + 311 = 3732
Step 13: 3732 + 311 = 4043
Step 14: 4043 + 311 = 4354
Step 15: 4354 + 311 = 4665
Step 16: 4665 + 311 = 4976
Step 17: 4976 + 311 = 5287
Step 18: 5287 + 311 = 5598
Step 19: 5598 + 311 = 5909
Step 20: 5909 + 311 = 6220
Step 21: 6220 + 311 = 6531
Step 22: 6531 + 311 = 6842
Step 23: 6842 + 311 = 7153
Step 24: 7153 + 311 = 7464
Step 25: 7464 + 311 = 7775
Step 26: 7775 + 311 = 8086
Step 27: 8086 + 311 = 8397
Step 28: 8397 + 311 = 8708
Step 29: 8708 + 311 = 9019
Step 30: 9019 + 311 = 9330
Step 31: 9330 + 311 = 9641
Step 32: 9641 + 311 = 9952
Step 33: 9952 + 311 = 10263
Step 34: 10263 + 311 = 10574
Step 35: 10574 + 311 = 10885
Step 36: 10885 + 311 = 11196
Step 37: 11196 + 311 = 11507
Step 38: 11507 + 311 = 11818
Step 39: 11818 + 311 = 12129
Step 40: 12129 + 311 = 12440
Step 41: 12440 + 311 = 12751
Step 42: 12751 + 311 = 13062
Step 43: 13062 + 311 = 13373
Step 44: 13373 + 311 = 13684
Step 45: 13684 + 311 = 13995
Step 46: 13995 + 311 = 14306
Step 47: 14306 + 311 = 14617
Step 48: 14617 + 311 = 14928
Step 49: 14928 + 311 = 15239

So, 311*49 = 15239