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 137. So, we're going to take the number 991 and add it to itself 137 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
Step 56: 54505 + 991 = 55496
Step 57: 55496 + 991 = 56487
Step 58: 56487 + 991 = 57478
Step 59: 57478 + 991 = 58469
Step 60: 58469 + 991 = 59460
Step 61: 59460 + 991 = 60451
Step 62: 60451 + 991 = 61442
Step 63: 61442 + 991 = 62433
Step 64: 62433 + 991 = 63424
Step 65: 63424 + 991 = 64415
Step 66: 64415 + 991 = 65406
Step 67: 65406 + 991 = 66397
Step 68: 66397 + 991 = 67388
Step 69: 67388 + 991 = 68379
Step 70: 68379 + 991 = 69370
Step 71: 69370 + 991 = 70361
Step 72: 70361 + 991 = 71352
Step 73: 71352 + 991 = 72343
Step 74: 72343 + 991 = 73334
Step 75: 73334 + 991 = 74325
Step 76: 74325 + 991 = 75316
Step 77: 75316 + 991 = 76307
Step 78: 76307 + 991 = 77298
Step 79: 77298 + 991 = 78289
Step 80: 78289 + 991 = 79280
Step 81: 79280 + 991 = 80271
Step 82: 80271 + 991 = 81262
Step 83: 81262 + 991 = 82253
Step 84: 82253 + 991 = 83244
Step 85: 83244 + 991 = 84235
Step 86: 84235 + 991 = 85226
Step 87: 85226 + 991 = 86217
Step 88: 86217 + 991 = 87208
Step 89: 87208 + 991 = 88199
Step 90: 88199 + 991 = 89190
Step 91: 89190 + 991 = 90181
Step 92: 90181 + 991 = 91172
Step 93: 91172 + 991 = 92163
Step 94: 92163 + 991 = 93154
Step 95: 93154 + 991 = 94145
Step 96: 94145 + 991 = 95136
Step 97: 95136 + 991 = 96127
Step 98: 96127 + 991 = 97118
Step 99: 97118 + 991 = 98109
Step 100: 98109 + 991 = 99100
Step 101: 99100 + 991 = 100091
Step 102: 100091 + 991 = 101082
Step 103: 101082 + 991 = 102073
Step 104: 102073 + 991 = 103064
Step 105: 103064 + 991 = 104055
Step 106: 104055 + 991 = 105046
Step 107: 105046 + 991 = 106037
Step 108: 106037 + 991 = 107028
Step 109: 107028 + 991 = 108019
Step 110: 108019 + 991 = 109010
Step 111: 109010 + 991 = 110001
Step 112: 110001 + 991 = 110992
Step 113: 110992 + 991 = 111983
Step 114: 111983 + 991 = 112974
Step 115: 112974 + 991 = 113965
Step 116: 113965 + 991 = 114956
Step 117: 114956 + 991 = 115947
Step 118: 115947 + 991 = 116938
Step 119: 116938 + 991 = 117929
Step 120: 117929 + 991 = 118920
Step 121: 118920 + 991 = 119911
Step 122: 119911 + 991 = 120902
Step 123: 120902 + 991 = 121893
Step 124: 121893 + 991 = 122884
Step 125: 122884 + 991 = 123875
Step 126: 123875 + 991 = 124866
Step 127: 124866 + 991 = 125857
Step 128: 125857 + 991 = 126848
Step 129: 126848 + 991 = 127839
Step 130: 127839 + 991 = 128830
Step 131: 128830 + 991 = 129821
Step 132: 129821 + 991 = 130812
Step 133: 130812 + 991 = 131803
Step 134: 131803 + 991 = 132794
Step 135: 132794 + 991 = 133785
Step 136: 133785 + 991 = 134776
Step 137: 134776 + 991 = 135767

So, 991*137 = 135767