Let's get this math done. We have 609 and we're going to multiply it by 40. This is the same as taking 609 and adding it to itself 40 times.
Step 1: 0 + 609 = 609
Step 2: 609 + 609 = 1218
Step 3: 1218 + 609 = 1827
Step 4: 1827 + 609 = 2436
Step 5: 2436 + 609 = 3045
Step 6: 3045 + 609 = 3654
Step 7: 3654 + 609 = 4263
Step 8: 4263 + 609 = 4872
Step 9: 4872 + 609 = 5481
Step 10: 5481 + 609 = 6090
Step 11: 6090 + 609 = 6699
Step 12: 6699 + 609 = 7308
Step 13: 7308 + 609 = 7917
Step 14: 7917 + 609 = 8526
Step 15: 8526 + 609 = 9135
Step 16: 9135 + 609 = 9744
Step 17: 9744 + 609 = 10353
Step 18: 10353 + 609 = 10962
Step 19: 10962 + 609 = 11571
Step 20: 11571 + 609 = 12180
Step 21: 12180 + 609 = 12789
Step 22: 12789 + 609 = 13398
Step 23: 13398 + 609 = 14007
Step 24: 14007 + 609 = 14616
Step 25: 14616 + 609 = 15225
Step 26: 15225 + 609 = 15834
Step 27: 15834 + 609 = 16443
Step 28: 16443 + 609 = 17052
Step 29: 17052 + 609 = 17661
Step 30: 17661 + 609 = 18270
Step 31: 18270 + 609 = 18879
Step 32: 18879 + 609 = 19488
Step 33: 19488 + 609 = 20097
Step 34: 20097 + 609 = 20706
Step 35: 20706 + 609 = 21315
Step 36: 21315 + 609 = 21924
Step 37: 21924 + 609 = 22533
Step 38: 22533 + 609 = 23142
Step 39: 23142 + 609 = 23751
Step 40: 23751 + 609 = 24360

So, 609*40 = 24360