Alright, let's solve this math problem step by step. First, we have the number 549. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 20. So, we're going to take the number 549 and add it to itself 20 times.
Step 1: 0 + 549 = 549
Step 2: 549 + 549 = 1098
Step 3: 1098 + 549 = 1647
Step 4: 1647 + 549 = 2196
Step 5: 2196 + 549 = 2745
Step 6: 2745 + 549 = 3294
Step 7: 3294 + 549 = 3843
Step 8: 3843 + 549 = 4392
Step 9: 4392 + 549 = 4941
Step 10: 4941 + 549 = 5490
Step 11: 5490 + 549 = 6039
Step 12: 6039 + 549 = 6588
Step 13: 6588 + 549 = 7137
Step 14: 7137 + 549 = 7686
Step 15: 7686 + 549 = 8235
Step 16: 8235 + 549 = 8784
Step 17: 8784 + 549 = 9333
Step 18: 9333 + 549 = 9882
Step 19: 9882 + 549 = 10431
Step 20: 10431 + 549 = 10980

So, 549*20 = 10980