Sure thing, let's get straight to it. We start with 543 and we're going to multiply it by 11, which means adding 543 to itself 11 times.
Step 1: 0 + 543 = 543
Step 2: 543 + 543 = 1086
Step 3: 1086 + 543 = 1629
Step 4: 1629 + 543 = 2172
Step 5: 2172 + 543 = 2715
Step 6: 2715 + 543 = 3258
Step 7: 3258 + 543 = 3801
Step 8: 3801 + 543 = 4344
Step 9: 4344 + 543 = 4887
Step 10: 4887 + 543 = 5430
Step 11: 5430 + 543 = 5973

So, 543*11 = 5973