Alright, let's solve this math problem step by step. First, we have the number 834. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 86. So, we're going to take the number 834 and add it to itself 86 times.
Step 1: 0 + 834 = 834
Step 2: 834 + 834 = 1668
Step 3: 1668 + 834 = 2502
Step 4: 2502 + 834 = 3336
Step 5: 3336 + 834 = 4170
Step 6: 4170 + 834 = 5004
Step 7: 5004 + 834 = 5838
Step 8: 5838 + 834 = 6672
Step 9: 6672 + 834 = 7506
Step 10: 7506 + 834 = 8340
Step 11: 8340 + 834 = 9174
Step 12: 9174 + 834 = 10008
Step 13: 10008 + 834 = 10842
Step 14: 10842 + 834 = 11676
Step 15: 11676 + 834 = 12510
Step 16: 12510 + 834 = 13344
Step 17: 13344 + 834 = 14178
Step 18: 14178 + 834 = 15012
Step 19: 15012 + 834 = 15846
Step 20: 15846 + 834 = 16680
Step 21: 16680 + 834 = 17514
Step 22: 17514 + 834 = 18348
Step 23: 18348 + 834 = 19182
Step 24: 19182 + 834 = 20016
Step 25: 20016 + 834 = 20850
Step 26: 20850 + 834 = 21684
Step 27: 21684 + 834 = 22518
Step 28: 22518 + 834 = 23352
Step 29: 23352 + 834 = 24186
Step 30: 24186 + 834 = 25020
Step 31: 25020 + 834 = 25854
Step 32: 25854 + 834 = 26688
Step 33: 26688 + 834 = 27522
Step 34: 27522 + 834 = 28356
Step 35: 28356 + 834 = 29190
Step 36: 29190 + 834 = 30024
Step 37: 30024 + 834 = 30858
Step 38: 30858 + 834 = 31692
Step 39: 31692 + 834 = 32526
Step 40: 32526 + 834 = 33360
Step 41: 33360 + 834 = 34194
Step 42: 34194 + 834 = 35028
Step 43: 35028 + 834 = 35862
Step 44: 35862 + 834 = 36696
Step 45: 36696 + 834 = 37530
Step 46: 37530 + 834 = 38364
Step 47: 38364 + 834 = 39198
Step 48: 39198 + 834 = 40032
Step 49: 40032 + 834 = 40866
Step 50: 40866 + 834 = 41700
Step 51: 41700 + 834 = 42534
Step 52: 42534 + 834 = 43368
Step 53: 43368 + 834 = 44202
Step 54: 44202 + 834 = 45036
Step 55: 45036 + 834 = 45870
Step 56: 45870 + 834 = 46704
Step 57: 46704 + 834 = 47538
Step 58: 47538 + 834 = 48372
Step 59: 48372 + 834 = 49206
Step 60: 49206 + 834 = 50040
Step 61: 50040 + 834 = 50874
Step 62: 50874 + 834 = 51708
Step 63: 51708 + 834 = 52542
Step 64: 52542 + 834 = 53376
Step 65: 53376 + 834 = 54210
Step 66: 54210 + 834 = 55044
Step 67: 55044 + 834 = 55878
Step 68: 55878 + 834 = 56712
Step 69: 56712 + 834 = 57546
Step 70: 57546 + 834 = 58380
Step 71: 58380 + 834 = 59214
Step 72: 59214 + 834 = 60048
Step 73: 60048 + 834 = 60882
Step 74: 60882 + 834 = 61716
Step 75: 61716 + 834 = 62550
Step 76: 62550 + 834 = 63384
Step 77: 63384 + 834 = 64218
Step 78: 64218 + 834 = 65052
Step 79: 65052 + 834 = 65886
Step 80: 65886 + 834 = 66720
Step 81: 66720 + 834 = 67554
Step 82: 67554 + 834 = 68388
Step 83: 68388 + 834 = 69222
Step 84: 69222 + 834 = 70056
Step 85: 70056 + 834 = 70890
Step 86: 70890 + 834 = 71724

So, 834*86 = 71724