Let's roll up our sleeves and solve this. We have 254 and we're going to multiply it by 78, essentially adding 254 to itself 78 times.
Step 1: 0 + 254 = 254
Step 2: 254 + 254 = 508
Step 3: 508 + 254 = 762
Step 4: 762 + 254 = 1016
Step 5: 1016 + 254 = 1270
Step 6: 1270 + 254 = 1524
Step 7: 1524 + 254 = 1778
Step 8: 1778 + 254 = 2032
Step 9: 2032 + 254 = 2286
Step 10: 2286 + 254 = 2540
Step 11: 2540 + 254 = 2794
Step 12: 2794 + 254 = 3048
Step 13: 3048 + 254 = 3302
Step 14: 3302 + 254 = 3556
Step 15: 3556 + 254 = 3810
Step 16: 3810 + 254 = 4064
Step 17: 4064 + 254 = 4318
Step 18: 4318 + 254 = 4572
Step 19: 4572 + 254 = 4826
Step 20: 4826 + 254 = 5080
Step 21: 5080 + 254 = 5334
Step 22: 5334 + 254 = 5588
Step 23: 5588 + 254 = 5842
Step 24: 5842 + 254 = 6096
Step 25: 6096 + 254 = 6350
Step 26: 6350 + 254 = 6604
Step 27: 6604 + 254 = 6858
Step 28: 6858 + 254 = 7112
Step 29: 7112 + 254 = 7366
Step 30: 7366 + 254 = 7620
Step 31: 7620 + 254 = 7874
Step 32: 7874 + 254 = 8128
Step 33: 8128 + 254 = 8382
Step 34: 8382 + 254 = 8636
Step 35: 8636 + 254 = 8890
Step 36: 8890 + 254 = 9144
Step 37: 9144 + 254 = 9398
Step 38: 9398 + 254 = 9652
Step 39: 9652 + 254 = 9906
Step 40: 9906 + 254 = 10160
Step 41: 10160 + 254 = 10414
Step 42: 10414 + 254 = 10668
Step 43: 10668 + 254 = 10922
Step 44: 10922 + 254 = 11176
Step 45: 11176 + 254 = 11430
Step 46: 11430 + 254 = 11684
Step 47: 11684 + 254 = 11938
Step 48: 11938 + 254 = 12192
Step 49: 12192 + 254 = 12446
Step 50: 12446 + 254 = 12700
Step 51: 12700 + 254 = 12954
Step 52: 12954 + 254 = 13208
Step 53: 13208 + 254 = 13462
Step 54: 13462 + 254 = 13716
Step 55: 13716 + 254 = 13970
Step 56: 13970 + 254 = 14224
Step 57: 14224 + 254 = 14478
Step 58: 14478 + 254 = 14732
Step 59: 14732 + 254 = 14986
Step 60: 14986 + 254 = 15240
Step 61: 15240 + 254 = 15494
Step 62: 15494 + 254 = 15748
Step 63: 15748 + 254 = 16002
Step 64: 16002 + 254 = 16256
Step 65: 16256 + 254 = 16510
Step 66: 16510 + 254 = 16764
Step 67: 16764 + 254 = 17018
Step 68: 17018 + 254 = 17272
Step 69: 17272 + 254 = 17526
Step 70: 17526 + 254 = 17780
Step 71: 17780 + 254 = 18034
Step 72: 18034 + 254 = 18288
Step 73: 18288 + 254 = 18542
Step 74: 18542 + 254 = 18796
Step 75: 18796 + 254 = 19050
Step 76: 19050 + 254 = 19304
Step 77: 19304 + 254 = 19558
Step 78: 19558 + 254 = 19812

So, 254*78 = 19812