Alright, let's solve this math problem step by step. First, we have the number 10. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 157. So, we're going to take the number 10 and add it to itself 157 times.
Step 1: 0 + 10 = 10
Step 2: 10 + 10 = 20
Step 3: 20 + 10 = 30
Step 4: 30 + 10 = 40
Step 5: 40 + 10 = 50
Step 6: 50 + 10 = 60
Step 7: 60 + 10 = 70
Step 8: 70 + 10 = 80
Step 9: 80 + 10 = 90
Step 10: 90 + 10 = 100
Step 11: 100 + 10 = 110
Step 12: 110 + 10 = 120
Step 13: 120 + 10 = 130
Step 14: 130 + 10 = 140
Step 15: 140 + 10 = 150
Step 16: 150 + 10 = 160
Step 17: 160 + 10 = 170
Step 18: 170 + 10 = 180
Step 19: 180 + 10 = 190
Step 20: 190 + 10 = 200
Step 21: 200 + 10 = 210
Step 22: 210 + 10 = 220
Step 23: 220 + 10 = 230
Step 24: 230 + 10 = 240
Step 25: 240 + 10 = 250
Step 26: 250 + 10 = 260
Step 27: 260 + 10 = 270
Step 28: 270 + 10 = 280
Step 29: 280 + 10 = 290
Step 30: 290 + 10 = 300
Step 31: 300 + 10 = 310
Step 32: 310 + 10 = 320
Step 33: 320 + 10 = 330
Step 34: 330 + 10 = 340
Step 35: 340 + 10 = 350
Step 36: 350 + 10 = 360
Step 37: 360 + 10 = 370
Step 38: 370 + 10 = 380
Step 39: 380 + 10 = 390
Step 40: 390 + 10 = 400
Step 41: 400 + 10 = 410
Step 42: 410 + 10 = 420
Step 43: 420 + 10 = 430
Step 44: 430 + 10 = 440
Step 45: 440 + 10 = 450
Step 46: 450 + 10 = 460
Step 47: 460 + 10 = 470
Step 48: 470 + 10 = 480
Step 49: 480 + 10 = 490
Step 50: 490 + 10 = 500
Step 51: 500 + 10 = 510
Step 52: 510 + 10 = 520
Step 53: 520 + 10 = 530
Step 54: 530 + 10 = 540
Step 55: 540 + 10 = 550
Step 56: 550 + 10 = 560
Step 57: 560 + 10 = 570
Step 58: 570 + 10 = 580
Step 59: 580 + 10 = 590
Step 60: 590 + 10 = 600
Step 61: 600 + 10 = 610
Step 62: 610 + 10 = 620
Step 63: 620 + 10 = 630
Step 64: 630 + 10 = 640
Step 65: 640 + 10 = 650
Step 66: 650 + 10 = 660
Step 67: 660 + 10 = 670
Step 68: 670 + 10 = 680
Step 69: 680 + 10 = 690
Step 70: 690 + 10 = 700
Step 71: 700 + 10 = 710
Step 72: 710 + 10 = 720
Step 73: 720 + 10 = 730
Step 74: 730 + 10 = 740
Step 75: 740 + 10 = 750
Step 76: 750 + 10 = 760
Step 77: 760 + 10 = 770
Step 78: 770 + 10 = 780
Step 79: 780 + 10 = 790
Step 80: 790 + 10 = 800
Step 81: 800 + 10 = 810
Step 82: 810 + 10 = 820
Step 83: 820 + 10 = 830
Step 84: 830 + 10 = 840
Step 85: 840 + 10 = 850
Step 86: 850 + 10 = 860
Step 87: 860 + 10 = 870
Step 88: 870 + 10 = 880
Step 89: 880 + 10 = 890
Step 90: 890 + 10 = 900
Step 91: 900 + 10 = 910
Step 92: 910 + 10 = 920
Step 93: 920 + 10 = 930
Step 94: 930 + 10 = 940
Step 95: 940 + 10 = 950
Step 96: 950 + 10 = 960
Step 97: 960 + 10 = 970
Step 98: 970 + 10 = 980
Step 99: 980 + 10 = 990
Step 100: 990 + 10 = 1000
Step 101: 1000 + 10 = 1010
Step 102: 1010 + 10 = 1020
Step 103: 1020 + 10 = 1030
Step 104: 1030 + 10 = 1040
Step 105: 1040 + 10 = 1050
Step 106: 1050 + 10 = 1060
Step 107: 1060 + 10 = 1070
Step 108: 1070 + 10 = 1080
Step 109: 1080 + 10 = 1090
Step 110: 1090 + 10 = 1100
Step 111: 1100 + 10 = 1110
Step 112: 1110 + 10 = 1120
Step 113: 1120 + 10 = 1130
Step 114: 1130 + 10 = 1140
Step 115: 1140 + 10 = 1150
Step 116: 1150 + 10 = 1160
Step 117: 1160 + 10 = 1170
Step 118: 1170 + 10 = 1180
Step 119: 1180 + 10 = 1190
Step 120: 1190 + 10 = 1200
Step 121: 1200 + 10 = 1210
Step 122: 1210 + 10 = 1220
Step 123: 1220 + 10 = 1230
Step 124: 1230 + 10 = 1240
Step 125: 1240 + 10 = 1250
Step 126: 1250 + 10 = 1260
Step 127: 1260 + 10 = 1270
Step 128: 1270 + 10 = 1280
Step 129: 1280 + 10 = 1290
Step 130: 1290 + 10 = 1300
Step 131: 1300 + 10 = 1310
Step 132: 1310 + 10 = 1320
Step 133: 1320 + 10 = 1330
Step 134: 1330 + 10 = 1340
Step 135: 1340 + 10 = 1350
Step 136: 1350 + 10 = 1360
Step 137: 1360 + 10 = 1370
Step 138: 1370 + 10 = 1380
Step 139: 1380 + 10 = 1390
Step 140: 1390 + 10 = 1400
Step 141: 1400 + 10 = 1410
Step 142: 1410 + 10 = 1420
Step 143: 1420 + 10 = 1430
Step 144: 1430 + 10 = 1440
Step 145: 1440 + 10 = 1450
Step 146: 1450 + 10 = 1460
Step 147: 1460 + 10 = 1470
Step 148: 1470 + 10 = 1480
Step 149: 1480 + 10 = 1490
Step 150: 1490 + 10 = 1500
Step 151: 1500 + 10 = 1510
Step 152: 1510 + 10 = 1520
Step 153: 1520 + 10 = 1530
Step 154: 1530 + 10 = 1540
Step 155: 1540 + 10 = 1550
Step 156: 1550 + 10 = 1560
Step 157: 1560 + 10 = 1570

So, 10*157 = 1570