Alright, let's solve this math problem step by step. First, we have the number 991. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 55. So, we're going to take the number 991 and add it to itself 55 times.
Step 1: 0 + 991 = 991
Step 2: 991 + 991 = 1982
Step 3: 1982 + 991 = 2973
Step 4: 2973 + 991 = 3964
Step 5: 3964 + 991 = 4955
Step 6: 4955 + 991 = 5946
Step 7: 5946 + 991 = 6937
Step 8: 6937 + 991 = 7928
Step 9: 7928 + 991 = 8919
Step 10: 8919 + 991 = 9910
Step 11: 9910 + 991 = 10901
Step 12: 10901 + 991 = 11892
Step 13: 11892 + 991 = 12883
Step 14: 12883 + 991 = 13874
Step 15: 13874 + 991 = 14865
Step 16: 14865 + 991 = 15856
Step 17: 15856 + 991 = 16847
Step 18: 16847 + 991 = 17838
Step 19: 17838 + 991 = 18829
Step 20: 18829 + 991 = 19820
Step 21: 19820 + 991 = 20811
Step 22: 20811 + 991 = 21802
Step 23: 21802 + 991 = 22793
Step 24: 22793 + 991 = 23784
Step 25: 23784 + 991 = 24775
Step 26: 24775 + 991 = 25766
Step 27: 25766 + 991 = 26757
Step 28: 26757 + 991 = 27748
Step 29: 27748 + 991 = 28739
Step 30: 28739 + 991 = 29730
Step 31: 29730 + 991 = 30721
Step 32: 30721 + 991 = 31712
Step 33: 31712 + 991 = 32703
Step 34: 32703 + 991 = 33694
Step 35: 33694 + 991 = 34685
Step 36: 34685 + 991 = 35676
Step 37: 35676 + 991 = 36667
Step 38: 36667 + 991 = 37658
Step 39: 37658 + 991 = 38649
Step 40: 38649 + 991 = 39640
Step 41: 39640 + 991 = 40631
Step 42: 40631 + 991 = 41622
Step 43: 41622 + 991 = 42613
Step 44: 42613 + 991 = 43604
Step 45: 43604 + 991 = 44595
Step 46: 44595 + 991 = 45586
Step 47: 45586 + 991 = 46577
Step 48: 46577 + 991 = 47568
Step 49: 47568 + 991 = 48559
Step 50: 48559 + 991 = 49550
Step 51: 49550 + 991 = 50541
Step 52: 50541 + 991 = 51532
Step 53: 51532 + 991 = 52523
Step 54: 52523 + 991 = 53514
Step 55: 53514 + 991 = 54505

So, 991*55 = 54505