Without delay, let's solve this. We've got 655 and we will be multiplying it by 24, that is, adding 655 to itself 24 times.
Step 1: 0 + 655 = 655
Step 2: 655 + 655 = 1310
Step 3: 1310 + 655 = 1965
Step 4: 1965 + 655 = 2620
Step 5: 2620 + 655 = 3275
Step 6: 3275 + 655 = 3930
Step 7: 3930 + 655 = 4585
Step 8: 4585 + 655 = 5240
Step 9: 5240 + 655 = 5895
Step 10: 5895 + 655 = 6550
Step 11: 6550 + 655 = 7205
Step 12: 7205 + 655 = 7860
Step 13: 7860 + 655 = 8515
Step 14: 8515 + 655 = 9170
Step 15: 9170 + 655 = 9825
Step 16: 9825 + 655 = 10480
Step 17: 10480 + 655 = 11135
Step 18: 11135 + 655 = 11790
Step 19: 11790 + 655 = 12445
Step 20: 12445 + 655 = 13100
Step 21: 13100 + 655 = 13755
Step 22: 13755 + 655 = 14410
Step 23: 14410 + 655 = 15065
Step 24: 15065 + 655 = 15720

So, 655*24 = 15720