Help!!! Is 2.33 the right answer? If not please say the correct answer and explain, I will mark you brainlist after. Also have a great rest of your day everyone!!!!!!

Answer:
The answer is 21.
Step-by-step explanation:
If the board was 7 feet long and each piece was cut into 1/3 of a foot, that means that there are actually 21 pieces
I put a picture if it helps...