Alright, let's solve this math problem step by step. First, we have the number 136. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 91. So, we're going to take the number 136 and add it to itself 91 times.
Step 1: 0 + 136 = 136
Step 2: 136 + 136 = 272
Step 3: 272 + 136 = 408
Step 4: 408 + 136 = 544
Step 5: 544 + 136 = 680
Step 6: 680 + 136 = 816
Step 7: 816 + 136 = 952
Step 8: 952 + 136 = 1088
Step 9: 1088 + 136 = 1224
Step 10: 1224 + 136 = 1360
Step 11: 1360 + 136 = 1496
Step 12: 1496 + 136 = 1632
Step 13: 1632 + 136 = 1768
Step 14: 1768 + 136 = 1904
Step 15: 1904 + 136 = 2040
Step 16: 2040 + 136 = 2176
Step 17: 2176 + 136 = 2312
Step 18: 2312 + 136 = 2448
Step 19: 2448 + 136 = 2584
Step 20: 2584 + 136 = 2720
Step 21: 2720 + 136 = 2856
Step 22: 2856 + 136 = 2992
Step 23: 2992 + 136 = 3128
Step 24: 3128 + 136 = 3264
Step 25: 3264 + 136 = 3400
Step 26: 3400 + 136 = 3536
Step 27: 3536 + 136 = 3672
Step 28: 3672 + 136 = 3808
Step 29: 3808 + 136 = 3944
Step 30: 3944 + 136 = 4080
Step 31: 4080 + 136 = 4216
Step 32: 4216 + 136 = 4352
Step 33: 4352 + 136 = 4488
Step 34: 4488 + 136 = 4624
Step 35: 4624 + 136 = 4760
Step 36: 4760 + 136 = 4896
Step 37: 4896 + 136 = 5032
Step 38: 5032 + 136 = 5168
Step 39: 5168 + 136 = 5304
Step 40: 5304 + 136 = 5440
Step 41: 5440 + 136 = 5576
Step 42: 5576 + 136 = 5712
Step 43: 5712 + 136 = 5848
Step 44: 5848 + 136 = 5984
Step 45: 5984 + 136 = 6120
Step 46: 6120 + 136 = 6256
Step 47: 6256 + 136 = 6392
Step 48: 6392 + 136 = 6528
Step 49: 6528 + 136 = 6664
Step 50: 6664 + 136 = 6800
Step 51: 6800 + 136 = 6936
Step 52: 6936 + 136 = 7072
Step 53: 7072 + 136 = 7208
Step 54: 7208 + 136 = 7344
Step 55: 7344 + 136 = 7480
Step 56: 7480 + 136 = 7616
Step 57: 7616 + 136 = 7752
Step 58: 7752 + 136 = 7888
Step 59: 7888 + 136 = 8024
Step 60: 8024 + 136 = 8160
Step 61: 8160 + 136 = 8296
Step 62: 8296 + 136 = 8432
Step 63: 8432 + 136 = 8568
Step 64: 8568 + 136 = 8704
Step 65: 8704 + 136 = 8840
Step 66: 8840 + 136 = 8976
Step 67: 8976 + 136 = 9112
Step 68: 9112 + 136 = 9248
Step 69: 9248 + 136 = 9384
Step 70: 9384 + 136 = 9520
Step 71: 9520 + 136 = 9656
Step 72: 9656 + 136 = 9792
Step 73: 9792 + 136 = 9928
Step 74: 9928 + 136 = 10064
Step 75: 10064 + 136 = 10200
Step 76: 10200 + 136 = 10336
Step 77: 10336 + 136 = 10472
Step 78: 10472 + 136 = 10608
Step 79: 10608 + 136 = 10744
Step 80: 10744 + 136 = 10880
Step 81: 10880 + 136 = 11016
Step 82: 11016 + 136 = 11152
Step 83: 11152 + 136 = 11288
Step 84: 11288 + 136 = 11424
Step 85: 11424 + 136 = 11560
Step 86: 11560 + 136 = 11696
Step 87: 11696 + 136 = 11832
Step 88: 11832 + 136 = 11968
Step 89: 11968 + 136 = 12104
Step 90: 12104 + 136 = 12240
Step 91: 12240 + 136 = 12376

So, 136*91 = 12376