OK, let's crack this. We're given 928 and our task is to multiply it by 30. Essentially, we'll be adding 928 to itself 30 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
Step 19: 16704 + 928 = 17632
Step 20: 17632 + 928 = 18560
Step 21: 18560 + 928 = 19488
Step 22: 19488 + 928 = 20416
Step 23: 20416 + 928 = 21344
Step 24: 21344 + 928 = 22272
Step 25: 22272 + 928 = 23200
Step 26: 23200 + 928 = 24128
Step 27: 24128 + 928 = 25056
Step 28: 25056 + 928 = 25984
Step 29: 25984 + 928 = 26912
Step 30: 26912 + 928 = 27840

So, 928*30 = 27840