Let's roll up our sleeves and solve this. We have 104 and we're going to multiply it by 24, essentially adding 104 to itself 24 times.
Step 1: 0 + 104 = 104
Step 2: 104 + 104 = 208
Step 3: 208 + 104 = 312
Step 4: 312 + 104 = 416
Step 5: 416 + 104 = 520
Step 6: 520 + 104 = 624
Step 7: 624 + 104 = 728
Step 8: 728 + 104 = 832
Step 9: 832 + 104 = 936
Step 10: 936 + 104 = 1040
Step 11: 1040 + 104 = 1144
Step 12: 1144 + 104 = 1248
Step 13: 1248 + 104 = 1352
Step 14: 1352 + 104 = 1456
Step 15: 1456 + 104 = 1560
Step 16: 1560 + 104 = 1664
Step 17: 1664 + 104 = 1768
Step 18: 1768 + 104 = 1872
Step 19: 1872 + 104 = 1976
Step 20: 1976 + 104 = 2080
Step 21: 2080 + 104 = 2184
Step 22: 2184 + 104 = 2288
Step 23: 2288 + 104 = 2392
Step 24: 2392 + 104 = 2496

So, 104*24 = 2496