OK, let's crack this. We're given 648 and our task is to multiply it by 22. Essentially, we'll be adding 648 to itself 22 times.
Step 1: 0 + 648 = 648
Step 2: 648 + 648 = 1296
Step 3: 1296 + 648 = 1944
Step 4: 1944 + 648 = 2592
Step 5: 2592 + 648 = 3240
Step 6: 3240 + 648 = 3888
Step 7: 3888 + 648 = 4536
Step 8: 4536 + 648 = 5184
Step 9: 5184 + 648 = 5832
Step 10: 5832 + 648 = 6480
Step 11: 6480 + 648 = 7128
Step 12: 7128 + 648 = 7776
Step 13: 7776 + 648 = 8424
Step 14: 8424 + 648 = 9072
Step 15: 9072 + 648 = 9720
Step 16: 9720 + 648 = 10368
Step 17: 10368 + 648 = 11016
Step 18: 11016 + 648 = 11664
Step 19: 11664 + 648 = 12312
Step 20: 12312 + 648 = 12960
Step 21: 12960 + 648 = 13608
Step 22: 13608 + 648 = 14256

So, 648*22 = 14256