The answer depends on how large each unit is.
1 by 1
If you have a board that is 1 by 12 inches that is 10 foot long you will have 10 inches of board feet. This a math problem.
10 centimeters equal 1 decimeter.
A board foot is 12 inches by 12 inches by 1 inch thick. A board 6 inches wide, 24 inches long and 1 inch thick is still 1 board foot. Any combination of the three measurements that add up to the first, 12x12x1 is considered 1 board foot.
A board 1 inch thick and 12 inches square is 1 board foot. Any combination of these measurements is 1 board foot. A board 2 inches thick, 6 inches wide and 12 inches long is 1 board foot. For instance, to calculate the board feet in a beam that measures 6" wide x 8" high x 10' long the formula is 6x8x10/12=40 bf . Likewise, a 2"wide x 10" high x 10' long piece of lumber is calculated 2x10x10/12=16.66 bf. So a 1x12x12 would calculate 1x12x12/12=12 bf. All board footage is calculated on rough dimensions, so even though a 2x10 S4S measures only 1 1/2"x 9 1/4" the board footage is calculated by multiplying 2 times 10 times the length divided by 12.
10
11x14
A 1 x 6 x 10 pine board has dimensions of 1 inch in thickness, 6 inches in width, and 10 feet in length.
The prefix deci- in the International System of Measurements means 1/10th. A liter has 10 deciliters.
10
A board foot is 12 inches by 12 inches, 1 inch thick. Any combination of measurements that equal this is 1 board. 6x24x1 is 1 board foot. 2.9 board foot could be anything. There should be another measurement saying what this is. Board foot is used to figure cost as most common wood is the same price per board foot. Could be 2x4, 2x12 or 1 inch, it all works out the roughly the same price.
0.2 cup 1 cup is 48 teaspoons 1 teaspoon is 0.02 cup