Sure thing, let's get straight to it. We start with 297 and we're going to multiply it by 85, which means adding 297 to itself 85 times.
Step 1: 0 + 297 = 297
Step 2: 297 + 297 = 594
Step 3: 594 + 297 = 891
Step 4: 891 + 297 = 1188
Step 5: 1188 + 297 = 1485
Step 6: 1485 + 297 = 1782
Step 7: 1782 + 297 = 2079
Step 8: 2079 + 297 = 2376
Step 9: 2376 + 297 = 2673
Step 10: 2673 + 297 = 2970
Step 11: 2970 + 297 = 3267
Step 12: 3267 + 297 = 3564
Step 13: 3564 + 297 = 3861
Step 14: 3861 + 297 = 4158
Step 15: 4158 + 297 = 4455
Step 16: 4455 + 297 = 4752
Step 17: 4752 + 297 = 5049
Step 18: 5049 + 297 = 5346
Step 19: 5346 + 297 = 5643
Step 20: 5643 + 297 = 5940
Step 21: 5940 + 297 = 6237
Step 22: 6237 + 297 = 6534
Step 23: 6534 + 297 = 6831
Step 24: 6831 + 297 = 7128
Step 25: 7128 + 297 = 7425
Step 26: 7425 + 297 = 7722
Step 27: 7722 + 297 = 8019
Step 28: 8019 + 297 = 8316
Step 29: 8316 + 297 = 8613
Step 30: 8613 + 297 = 8910
Step 31: 8910 + 297 = 9207
Step 32: 9207 + 297 = 9504
Step 33: 9504 + 297 = 9801
Step 34: 9801 + 297 = 10098
Step 35: 10098 + 297 = 10395
Step 36: 10395 + 297 = 10692
Step 37: 10692 + 297 = 10989
Step 38: 10989 + 297 = 11286
Step 39: 11286 + 297 = 11583
Step 40: 11583 + 297 = 11880
Step 41: 11880 + 297 = 12177
Step 42: 12177 + 297 = 12474
Step 43: 12474 + 297 = 12771
Step 44: 12771 + 297 = 13068
Step 45: 13068 + 297 = 13365
Step 46: 13365 + 297 = 13662
Step 47: 13662 + 297 = 13959
Step 48: 13959 + 297 = 14256
Step 49: 14256 + 297 = 14553
Step 50: 14553 + 297 = 14850
Step 51: 14850 + 297 = 15147
Step 52: 15147 + 297 = 15444
Step 53: 15444 + 297 = 15741
Step 54: 15741 + 297 = 16038
Step 55: 16038 + 297 = 16335
Step 56: 16335 + 297 = 16632
Step 57: 16632 + 297 = 16929
Step 58: 16929 + 297 = 17226
Step 59: 17226 + 297 = 17523
Step 60: 17523 + 297 = 17820
Step 61: 17820 + 297 = 18117
Step 62: 18117 + 297 = 18414
Step 63: 18414 + 297 = 18711
Step 64: 18711 + 297 = 19008
Step 65: 19008 + 297 = 19305
Step 66: 19305 + 297 = 19602
Step 67: 19602 + 297 = 19899
Step 68: 19899 + 297 = 20196
Step 69: 20196 + 297 = 20493
Step 70: 20493 + 297 = 20790
Step 71: 20790 + 297 = 21087
Step 72: 21087 + 297 = 21384
Step 73: 21384 + 297 = 21681
Step 74: 21681 + 297 = 21978
Step 75: 21978 + 297 = 22275
Step 76: 22275 + 297 = 22572
Step 77: 22572 + 297 = 22869
Step 78: 22869 + 297 = 23166
Step 79: 23166 + 297 = 23463
Step 80: 23463 + 297 = 23760
Step 81: 23760 + 297 = 24057
Step 82: 24057 + 297 = 24354
Step 83: 24354 + 297 = 24651
Step 84: 24651 + 297 = 24948
Step 85: 24948 + 297 = 25245

So, 297*85 = 25245