To find the circumference \( C \) of a circle with a diameter \( d \) of 25 feet, you can use the formula:
\[ C = \pi d \]
Substituting \( \pi \) with 3.14 and \( d \) with 25 feet:
\[ C = 3.14 \times 25 \]
Calculating this:
\[ C = 3.14 \times 25 = 78.5 \text{ ft.} \]
So, the circumference of the circle is \( C = 78.5 \) feet.