Sure thing! We've got 537 and we're gonna multiply it by 26. That's the same as adding 537 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