Alright, let's solve this math problem step by step. First, we have the number 537. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 26. So, we're going to take the number 537 and add it to itself 26 times.
Step 1: 0 + 537 = 537
Step 2: 537 + 537 = 1074
Step 3: 1074 + 537 = 1611
Step 4: 1611 + 537 = 2148
Step 5: 2148 + 537 = 2685
Step 6: 2685 + 537 = 3222
Step 7: 3222 + 537 = 3759
Step 8: 3759 + 537 = 4296
Step 9: 4296 + 537 = 4833
Step 10: 4833 + 537 = 5370
Step 11: 5370 + 537 = 5907
Step 12: 5907 + 537 = 6444
Step 13: 6444 + 537 = 6981
Step 14: 6981 + 537 = 7518
Step 15: 7518 + 537 = 8055
Step 16: 8055 + 537 = 8592
Step 17: 8592 + 537 = 9129
Step 18: 9129 + 537 = 9666
Step 19: 9666 + 537 = 10203
Step 20: 10203 + 537 = 10740
Step 21: 10740 + 537 = 11277
Step 22: 11277 + 537 = 11814
Step 23: 11814 + 537 = 12351
Step 24: 12351 + 537 = 12888
Step 25: 12888 + 537 = 13425
Step 26: 13425 + 537 = 13962

So, 537*26 = 13962