OK, let's crack this. We're given 656 and our task is to multiply it by 18. Essentially, we'll be adding 656 to itself 18 times.
Step 1: 0 + 656 = 656
Step 2: 656 + 656 = 1312
Step 3: 1312 + 656 = 1968
Step 4: 1968 + 656 = 2624
Step 5: 2624 + 656 = 3280
Step 6: 3280 + 656 = 3936
Step 7: 3936 + 656 = 4592
Step 8: 4592 + 656 = 5248
Step 9: 5248 + 656 = 5904
Step 10: 5904 + 656 = 6560
Step 11: 6560 + 656 = 7216
Step 12: 7216 + 656 = 7872
Step 13: 7872 + 656 = 8528
Step 14: 8528 + 656 = 9184
Step 15: 9184 + 656 = 9840
Step 16: 9840 + 656 = 10496
Step 17: 10496 + 656 = 11152
Step 18: 11152 + 656 = 11808

So, 656*18 = 11808