Alright, let's solve this math problem step by step. First, we have the number 837. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 23. So, we're going to take the number 837 and add it to itself 23 times.
Step 1: 0 + 837 = 837
Step 2: 837 + 837 = 1674
Step 3: 1674 + 837 = 2511
Step 4: 2511 + 837 = 3348
Step 5: 3348 + 837 = 4185
Step 6: 4185 + 837 = 5022
Step 7: 5022 + 837 = 5859
Step 8: 5859 + 837 = 6696
Step 9: 6696 + 837 = 7533
Step 10: 7533 + 837 = 8370
Step 11: 8370 + 837 = 9207
Step 12: 9207 + 837 = 10044
Step 13: 10044 + 837 = 10881
Step 14: 10881 + 837 = 11718
Step 15: 11718 + 837 = 12555
Step 16: 12555 + 837 = 13392
Step 17: 13392 + 837 = 14229
Step 18: 14229 + 837 = 15066
Step 19: 15066 + 837 = 15903
Step 20: 15903 + 837 = 16740
Step 21: 16740 + 837 = 17577
Step 22: 17577 + 837 = 18414
Step 23: 18414 + 837 = 19251

So, 837*23 = 19251