There are 3 families with 4 people each, so a total of 3 * 4 = 12 people.
Each person uses 1 oversized beach towel per day, so there are 12 * 1 = 12 oversized beach towels used per day.
They are staying for 7 days, so there will be a total of 12 * 7 = 84 oversized beach towels used during their stay.
The washing machine can hold 14 oversized beach towels per load, so it will take 84 / 14 = 6 loads of laundry to wash all the oversized beach towels.
#### 6
The answer is: 6
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
3 families of 4 people shared a vacation rental for 7 days.  Everyone uses 1 oversized beach towel a day before getting a new one.  The washing machine can hold 14 oversized beach towels per load.  How many loads of laundry will it take to wash all the oversized beach towels?

### Answer:
