Let's roll up our sleeves and solve this. We have 383 and we're going to multiply it by 15, essentially adding 383 to itself 15 times.
Step 1: 0 + 383 = 383
Step 2: 383 + 383 = 766
Step 3: 766 + 383 = 1149
Step 4: 1149 + 383 = 1532
Step 5: 1532 + 383 = 1915
Step 6: 1915 + 383 = 2298
Step 7: 2298 + 383 = 2681
Step 8: 2681 + 383 = 3064
Step 9: 3064 + 383 = 3447
Step 10: 3447 + 383 = 3830
Step 11: 3830 + 383 = 4213
Step 12: 4213 + 383 = 4596
Step 13: 4596 + 383 = 4979
Step 14: 4979 + 383 = 5362
Step 15: 5362 + 383 = 5745

So, 383*15 = 5745