I need help on how to show my work and how to get the answer help me pls

Answer:3,150
Step-by-step explanation:
Well I what I did was I took 450 and then multiplied it by the number of days there are in a week which is 7 so I did 450 x 7 and got 3,150
I hope its right if not please let me know and I would be happy to check over again =)