Area, SM-Bank 019 MC

Brock decided to cut out a small rectangle from a piece of patterned rectangular paper.

The rectangle cut out has a length of 60 mm and a height of 40 mm.

Which of the following expressions gives the area of patterned paper that was left after cutting out the smaller rectangle?
 

1. \((120\times 200)-(60\times 160)\)
2. \((60\times 160)\)
3. \((120\times 200)-(40\times 160)\)
4. \((120\times 200)-(60\times 40)\)