Finish the following sentence with the best choice: How can I calculate how much water my plant will need during my vacation?

Choices:
- Multiply the number of days you will be gone by the amount of water needed by the plant per day.
- Multiply the number of days you will be gone by the amount of water needed by the plant per week.

Answer:
Multiply the number of days you will be gone by the amount of water needed by the plant per day.