Inches:

* There are 12 inches in 1 foot.

* Multiply 3.5 feet by 12 inches/foot: 3.5 feet * 12 inches/foot = 42 inches

Yards:

* There are 3 feet in 1 yard.

* Divide 3.5 feet by 3 feet/yard: 3.5 feet / 3 feet/yard = 1.17 yards (approximately)