A large box contains 18 small boxes and each small box contains 28 chocolate bars. How many chocolate bars are in the large box? Select the correct option:
A) 220
B) 490
C) 380
D) 450
E) 504

Rationale: "the only thing you have to do is a simple multiply we have : 18 * 28 = 504 correct answer is : e ) 504"
Answer: E