The living room measures 16' long and 20' wide, so the total area is 16 * 20 = 320 sq ft.
Tom has already put down 250 sq ft of flooring, so he needs to cover 320 - 250 = 70 sq ft more.
The flooring comes in boxes of 10 sq ft each, so Tom needs 70 / 10 = 7 more boxes.
#### 7
The answer is: 7
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Tom was putting hardwood flooring into his living room that measured 16' long and 20' wide.  The flooring comes 10 sq ft per box and he has already put down 250 sq ft of flooring.  How many more boxes does Tom need to complete the job?

### Answer:
