Alright, let's solve this math problem step by step. First, we have the number 315. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 49. So, we're going to take the number 315 and add it to itself 49 times.
Step 1: 0 + 315 = 315
Step 2: 315 + 315 = 630
Step 3: 630 + 315 = 945
Step 4: 945 + 315 = 1260
Step 5: 1260 + 315 = 1575
Step 6: 1575 + 315 = 1890
Step 7: 1890 + 315 = 2205
Step 8: 2205 + 315 = 2520
Step 9: 2520 + 315 = 2835
Step 10: 2835 + 315 = 3150
Step 11: 3150 + 315 = 3465
Step 12: 3465 + 315 = 3780
Step 13: 3780 + 315 = 4095
Step 14: 4095 + 315 = 4410
Step 15: 4410 + 315 = 4725
Step 16: 4725 + 315 = 5040
Step 17: 5040 + 315 = 5355
Step 18: 5355 + 315 = 5670
Step 19: 5670 + 315 = 5985
Step 20: 5985 + 315 = 6300
Step 21: 6300 + 315 = 6615
Step 22: 6615 + 315 = 6930
Step 23: 6930 + 315 = 7245
Step 24: 7245 + 315 = 7560
Step 25: 7560 + 315 = 7875
Step 26: 7875 + 315 = 8190
Step 27: 8190 + 315 = 8505
Step 28: 8505 + 315 = 8820
Step 29: 8820 + 315 = 9135
Step 30: 9135 + 315 = 9450
Step 31: 9450 + 315 = 9765
Step 32: 9765 + 315 = 10080
Step 33: 10080 + 315 = 10395
Step 34: 10395 + 315 = 10710
Step 35: 10710 + 315 = 11025
Step 36: 11025 + 315 = 11340
Step 37: 11340 + 315 = 11655
Step 38: 11655 + 315 = 11970
Step 39: 11970 + 315 = 12285
Step 40: 12285 + 315 = 12600
Step 41: 12600 + 315 = 12915
Step 42: 12915 + 315 = 13230
Step 43: 13230 + 315 = 13545
Step 44: 13545 + 315 = 13860
Step 45: 13860 + 315 = 14175
Step 46: 14175 + 315 = 14490
Step 47: 14490 + 315 = 14805
Step 48: 14805 + 315 = 15120
Step 49: 15120 + 315 = 15435

So, 315*49 = 15435