OK, let's work through this together. We're starting with 869 and we're going to multiply it by 46, which means we add 869 to itself 46 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

So, 869*46 = 39974