OK, let's crack this. We're given 28 and our task is to multiply it by 11. Essentially, we'll be adding 28 to itself 11 times.
Step 1: 0 + 28 = 28
Step 2: 28 + 28 = 56
Step 3: 56 + 28 = 84
Step 4: 84 + 28 = 112
Step 5: 112 + 28 = 140
Step 6: 140 + 28 = 168
Step 7: 168 + 28 = 196
Step 8: 196 + 28 = 224
Step 9: 224 + 28 = 252
Step 10: 252 + 28 = 280
Step 11: 280 + 28 = 308

So, 28*11 = 308