OK, let's work through this together. We're starting with 108 and we're going to multiply it by 26, which means we add 108 to itself 26 times.
Step 1: 0 + 108 = 108
Step 2: 108 + 108 = 216
Step 3: 216 + 108 = 324
Step 4: 324 + 108 = 432
Step 5: 432 + 108 = 540
Step 6: 540 + 108 = 648
Step 7: 648 + 108 = 756
Step 8: 756 + 108 = 864
Step 9: 864 + 108 = 972
Step 10: 972 + 108 = 1080
Step 11: 1080 + 108 = 1188
Step 12: 1188 + 108 = 1296
Step 13: 1296 + 108 = 1404
Step 14: 1404 + 108 = 1512
Step 15: 1512 + 108 = 1620
Step 16: 1620 + 108 = 1728
Step 17: 1728 + 108 = 1836
Step 18: 1836 + 108 = 1944
Step 19: 1944 + 108 = 2052
Step 20: 2052 + 108 = 2160
Step 21: 2160 + 108 = 2268
Step 22: 2268 + 108 = 2376
Step 23: 2376 + 108 = 2484
Step 24: 2484 + 108 = 2592
Step 25: 2592 + 108 = 2700
Step 26: 2700 + 108 = 2808

So, 108*26 = 2808