Let's get this math done. We have 287 and we're going to multiply it by 24. This is the same as taking 287 and adding it to itself 24 times.
Step 1: 0 + 287 = 287
Step 2: 287 + 287 = 574
Step 3: 574 + 287 = 861
Step 4: 861 + 287 = 1148
Step 5: 1148 + 287 = 1435
Step 6: 1435 + 287 = 1722
Step 7: 1722 + 287 = 2009
Step 8: 2009 + 287 = 2296
Step 9: 2296 + 287 = 2583
Step 10: 2583 + 287 = 2870
Step 11: 2870 + 287 = 3157
Step 12: 3157 + 287 = 3444
Step 13: 3444 + 287 = 3731
Step 14: 3731 + 287 = 4018
Step 15: 4018 + 287 = 4305
Step 16: 4305 + 287 = 4592
Step 17: 4592 + 287 = 4879
Step 18: 4879 + 287 = 5166
Step 19: 5166 + 287 = 5453
Step 20: 5453 + 287 = 5740
Step 21: 5740 + 287 = 6027
Step 22: 6027 + 287 = 6314
Step 23: 6314 + 287 = 6601
Step 24: 6601 + 287 = 6888

So, 287*24 = 6888