OK, let's work through this together. We're starting with 586 and we're going to multiply it by 11, which means we add 586 to itself 11 times.
Step 1: 0 + 586 = 586
Step 2: 586 + 586 = 1172
Step 3: 1172 + 586 = 1758
Step 4: 1758 + 586 = 2344
Step 5: 2344 + 586 = 2930
Step 6: 2930 + 586 = 3516
Step 7: 3516 + 586 = 4102
Step 8: 4102 + 586 = 4688
Step 9: 4688 + 586 = 5274
Step 10: 5274 + 586 = 5860
Step 11: 5860 + 586 = 6446

So, 586*11 = 6446