Alright, let's solve this math problem step by step. First, we have the number 261. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 58. So, we're going to take the number 261 and add it to itself 58 times.
Step 1: 0 + 261 = 261
Step 2: 261 + 261 = 522
Step 3: 522 + 261 = 783
Step 4: 783 + 261 = 1044
Step 5: 1044 + 261 = 1305
Step 6: 1305 + 261 = 1566
Step 7: 1566 + 261 = 1827
Step 8: 1827 + 261 = 2088
Step 9: 2088 + 261 = 2349
Step 10: 2349 + 261 = 2610
Step 11: 2610 + 261 = 2871
Step 12: 2871 + 261 = 3132
Step 13: 3132 + 261 = 3393
Step 14: 3393 + 261 = 3654
Step 15: 3654 + 261 = 3915
Step 16: 3915 + 261 = 4176
Step 17: 4176 + 261 = 4437
Step 18: 4437 + 261 = 4698
Step 19: 4698 + 261 = 4959
Step 20: 4959 + 261 = 5220
Step 21: 5220 + 261 = 5481
Step 22: 5481 + 261 = 5742
Step 23: 5742 + 261 = 6003
Step 24: 6003 + 261 = 6264
Step 25: 6264 + 261 = 6525
Step 26: 6525 + 261 = 6786
Step 27: 6786 + 261 = 7047
Step 28: 7047 + 261 = 7308
Step 29: 7308 + 261 = 7569
Step 30: 7569 + 261 = 7830
Step 31: 7830 + 261 = 8091
Step 32: 8091 + 261 = 8352
Step 33: 8352 + 261 = 8613
Step 34: 8613 + 261 = 8874
Step 35: 8874 + 261 = 9135
Step 36: 9135 + 261 = 9396
Step 37: 9396 + 261 = 9657
Step 38: 9657 + 261 = 9918
Step 39: 9918 + 261 = 10179
Step 40: 10179 + 261 = 10440
Step 41: 10440 + 261 = 10701
Step 42: 10701 + 261 = 10962
Step 43: 10962 + 261 = 11223
Step 44: 11223 + 261 = 11484
Step 45: 11484 + 261 = 11745
Step 46: 11745 + 261 = 12006
Step 47: 12006 + 261 = 12267
Step 48: 12267 + 261 = 12528
Step 49: 12528 + 261 = 12789
Step 50: 12789 + 261 = 13050
Step 51: 13050 + 261 = 13311
Step 52: 13311 + 261 = 13572
Step 53: 13572 + 261 = 13833
Step 54: 13833 + 261 = 14094
Step 55: 14094 + 261 = 14355
Step 56: 14355 + 261 = 14616
Step 57: 14616 + 261 = 14877
Step 58: 14877 + 261 = 15138

So, 261*58 = 15138