Without delay, let's solve this. We've got 109 and we will be multiplying it by 23, that is, adding 109 to itself 23 times.
Step 1: 0 + 109 = 109
Step 2: 109 + 109 = 218
Step 3: 218 + 109 = 327
Step 4: 327 + 109 = 436
Step 5: 436 + 109 = 545
Step 6: 545 + 109 = 654
Step 7: 654 + 109 = 763
Step 8: 763 + 109 = 872
Step 9: 872 + 109 = 981
Step 10: 981 + 109 = 1090
Step 11: 1090 + 109 = 1199
Step 12: 1199 + 109 = 1308
Step 13: 1308 + 109 = 1417
Step 14: 1417 + 109 = 1526
Step 15: 1526 + 109 = 1635
Step 16: 1635 + 109 = 1744
Step 17: 1744 + 109 = 1853
Step 18: 1853 + 109 = 1962
Step 19: 1962 + 109 = 2071
Step 20: 2071 + 109 = 2180
Step 21: 2180 + 109 = 2289
Step 22: 2289 + 109 = 2398
Step 23: 2398 + 109 = 2507

So, 109*23 = 2507