OK, let's work through this together. We're starting with 928 and we're going to multiply it by 18, which means we add 928 to itself 18 times.
Step 1: 0 + 928 = 928
Step 2: 928 + 928 = 1856
Step 3: 1856 + 928 = 2784
Step 4: 2784 + 928 = 3712
Step 5: 3712 + 928 = 4640
Step 6: 4640 + 928 = 5568
Step 7: 5568 + 928 = 6496
Step 8: 6496 + 928 = 7424
Step 9: 7424 + 928 = 8352
Step 10: 8352 + 928 = 9280
Step 11: 9280 + 928 = 10208
Step 12: 10208 + 928 = 11136
Step 13: 11136 + 928 = 12064
Step 14: 12064 + 928 = 12992
Step 15: 12992 + 928 = 13920
Step 16: 13920 + 928 = 14848
Step 17: 14848 + 928 = 15776
Step 18: 15776 + 928 = 16704

So, 928*18 = 16704