There are a couple paths to take with this question as presented.

Path one is the simpler, what is the total linear feet of boards.

What is known?

Number of pieces = 170

All pieces are identical and have the dimension 1 in thick x 8 in wide x 14 in long.

The total length will be 170 x 14 inches = 2380 inches

To get the total length in feet, convert the 2380 inches to feet.

The conversion is 12 inches = 1 foot or 12 in/ft.

To convert, divide the inches by 12: 2380/12 = 198.33 ft

To check the answer, you can determine the length of one piece of wood by converting

14 inches to ft: 14/12 = 1.667 ft,

Then multiply 1.667 x 170 pieces = 198.33.

Not clear by the question is if the a lumber industry measure of board feet is the desired answer.

To find board feet, the formula for board feet is ( thickness(in) x width (in) x length (in) )/144.

In this problem, the board feet = 170 x (1 x 8 x14)/144 = 132.2

I present both approaches to reinforce one must be very clear about what answer is required.