OK, let's work through this together. We're starting with 814 and we're going to multiply it by 24, which means we add 814 to itself 24 times.
Step 1: 0 + 814 = 814
Step 2: 814 + 814 = 1628
Step 3: 1628 + 814 = 2442
Step 4: 2442 + 814 = 3256
Step 5: 3256 + 814 = 4070
Step 6: 4070 + 814 = 4884
Step 7: 4884 + 814 = 5698
Step 8: 5698 + 814 = 6512
Step 9: 6512 + 814 = 7326
Step 10: 7326 + 814 = 8140
Step 11: 8140 + 814 = 8954
Step 12: 8954 + 814 = 9768
Step 13: 9768 + 814 = 10582
Step 14: 10582 + 814 = 11396
Step 15: 11396 + 814 = 12210
Step 16: 12210 + 814 = 13024
Step 17: 13024 + 814 = 13838
Step 18: 13838 + 814 = 14652
Step 19: 14652 + 814 = 15466
Step 20: 15466 + 814 = 16280
Step 21: 16280 + 814 = 17094
Step 22: 17094 + 814 = 17908
Step 23: 17908 + 814 = 18722
Step 24: 18722 + 814 = 19536

So, 814*24 = 19536