Alright, let's solve this math problem step by step. First, we have the number 869. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 55. So, we're going to take the number 869 and add it to itself 55 times.
Step 1: 0 + 869 = 869
Step 2: 869 + 869 = 1738
Step 3: 1738 + 869 = 2607
Step 4: 2607 + 869 = 3476
Step 5: 3476 + 869 = 4345
Step 6: 4345 + 869 = 5214
Step 7: 5214 + 869 = 6083
Step 8: 6083 + 869 = 6952
Step 9: 6952 + 869 = 7821
Step 10: 7821 + 869 = 8690
Step 11: 8690 + 869 = 9559
Step 12: 9559 + 869 = 10428
Step 13: 10428 + 869 = 11297
Step 14: 11297 + 869 = 12166
Step 15: 12166 + 869 = 13035
Step 16: 13035 + 869 = 13904
Step 17: 13904 + 869 = 14773
Step 18: 14773 + 869 = 15642
Step 19: 15642 + 869 = 16511
Step 20: 16511 + 869 = 17380
Step 21: 17380 + 869 = 18249
Step 22: 18249 + 869 = 19118
Step 23: 19118 + 869 = 19987
Step 24: 19987 + 869 = 20856
Step 25: 20856 + 869 = 21725
Step 26: 21725 + 869 = 22594
Step 27: 22594 + 869 = 23463
Step 28: 23463 + 869 = 24332
Step 29: 24332 + 869 = 25201
Step 30: 25201 + 869 = 26070
Step 31: 26070 + 869 = 26939
Step 32: 26939 + 869 = 27808
Step 33: 27808 + 869 = 28677
Step 34: 28677 + 869 = 29546
Step 35: 29546 + 869 = 30415
Step 36: 30415 + 869 = 31284
Step 37: 31284 + 869 = 32153
Step 38: 32153 + 869 = 33022
Step 39: 33022 + 869 = 33891
Step 40: 33891 + 869 = 34760
Step 41: 34760 + 869 = 35629
Step 42: 35629 + 869 = 36498
Step 43: 36498 + 869 = 37367
Step 44: 37367 + 869 = 38236
Step 45: 38236 + 869 = 39105
Step 46: 39105 + 869 = 39974
Step 47: 39974 + 869 = 40843
Step 48: 40843 + 869 = 41712
Step 49: 41712 + 869 = 42581
Step 50: 42581 + 869 = 43450
Step 51: 43450 + 869 = 44319
Step 52: 44319 + 869 = 45188
Step 53: 45188 + 869 = 46057
Step 54: 46057 + 869 = 46926
Step 55: 46926 + 869 = 47795

So, 869*55 = 47795