OK, let's crack this. We're given 676 and our task is to multiply it by 27. Essentially, we'll be adding 676 to itself 27 times.
Step 1: 0 + 676 = 676
Step 2: 676 + 676 = 1352
Step 3: 1352 + 676 = 2028
Step 4: 2028 + 676 = 2704
Step 5: 2704 + 676 = 3380
Step 6: 3380 + 676 = 4056
Step 7: 4056 + 676 = 4732
Step 8: 4732 + 676 = 5408
Step 9: 5408 + 676 = 6084
Step 10: 6084 + 676 = 6760
Step 11: 6760 + 676 = 7436
Step 12: 7436 + 676 = 8112
Step 13: 8112 + 676 = 8788
Step 14: 8788 + 676 = 9464
Step 15: 9464 + 676 = 10140
Step 16: 10140 + 676 = 10816
Step 17: 10816 + 676 = 11492
Step 18: 11492 + 676 = 12168
Step 19: 12168 + 676 = 12844
Step 20: 12844 + 676 = 13520
Step 21: 13520 + 676 = 14196
Step 22: 14196 + 676 = 14872
Step 23: 14872 + 676 = 15548
Step 24: 15548 + 676 = 16224
Step 25: 16224 + 676 = 16900
Step 26: 16900 + 676 = 17576
Step 27: 17576 + 676 = 18252

So, 676*27 = 18252