OK, let's crack this. We're given 806 and our task is to multiply it by 18. Essentially, we'll be adding 806 to itself 18 times.
Step 1: 0 + 806 = 806
Step 2: 806 + 806 = 1612
Step 3: 1612 + 806 = 2418
Step 4: 2418 + 806 = 3224
Step 5: 3224 + 806 = 4030
Step 6: 4030 + 806 = 4836
Step 7: 4836 + 806 = 5642
Step 8: 5642 + 806 = 6448
Step 9: 6448 + 806 = 7254
Step 10: 7254 + 806 = 8060
Step 11: 8060 + 806 = 8866
Step 12: 8866 + 806 = 9672
Step 13: 9672 + 806 = 10478
Step 14: 10478 + 806 = 11284
Step 15: 11284 + 806 = 12090
Step 16: 12090 + 806 = 12896
Step 17: 12896 + 806 = 13702
Step 18: 13702 + 806 = 14508

So, 806*18 = 14508