Let's roll up our sleeves and solve this. We have 860 and we're going to multiply it by 58, essentially adding 860 to itself 58 times.
Step 1: 0 + 860 = 860
Step 2: 860 + 860 = 1720
Step 3: 1720 + 860 = 2580
Step 4: 2580 + 860 = 3440
Step 5: 3440 + 860 = 4300
Step 6: 4300 + 860 = 5160
Step 7: 5160 + 860 = 6020
Step 8: 6020 + 860 = 6880
Step 9: 6880 + 860 = 7740
Step 10: 7740 + 860 = 8600
Step 11: 8600 + 860 = 9460
Step 12: 9460 + 860 = 10320
Step 13: 10320 + 860 = 11180
Step 14: 11180 + 860 = 12040
Step 15: 12040 + 860 = 12900
Step 16: 12900 + 860 = 13760
Step 17: 13760 + 860 = 14620
Step 18: 14620 + 860 = 15480
Step 19: 15480 + 860 = 16340
Step 20: 16340 + 860 = 17200
Step 21: 17200 + 860 = 18060
Step 22: 18060 + 860 = 18920
Step 23: 18920 + 860 = 19780
Step 24: 19780 + 860 = 20640
Step 25: 20640 + 860 = 21500
Step 26: 21500 + 860 = 22360
Step 27: 22360 + 860 = 23220
Step 28: 23220 + 860 = 24080
Step 29: 24080 + 860 = 24940
Step 30: 24940 + 860 = 25800
Step 31: 25800 + 860 = 26660
Step 32: 26660 + 860 = 27520
Step 33: 27520 + 860 = 28380
Step 34: 28380 + 860 = 29240
Step 35: 29240 + 860 = 30100
Step 36: 30100 + 860 = 30960
Step 37: 30960 + 860 = 31820
Step 38: 31820 + 860 = 32680
Step 39: 32680 + 860 = 33540
Step 40: 33540 + 860 = 34400
Step 41: 34400 + 860 = 35260
Step 42: 35260 + 860 = 36120
Step 43: 36120 + 860 = 36980
Step 44: 36980 + 860 = 37840
Step 45: 37840 + 860 = 38700
Step 46: 38700 + 860 = 39560
Step 47: 39560 + 860 = 40420
Step 48: 40420 + 860 = 41280
Step 49: 41280 + 860 = 42140
Step 50: 42140 + 860 = 43000
Step 51: 43000 + 860 = 43860
Step 52: 43860 + 860 = 44720
Step 53: 44720 + 860 = 45580
Step 54: 45580 + 860 = 46440
Step 55: 46440 + 860 = 47300
Step 56: 47300 + 860 = 48160
Step 57: 48160 + 860 = 49020
Step 58: 49020 + 860 = 49880

So, 860*58 = 49880