To find the circumference of a circle, you can use the formula:
\[ C = \pi \times d \]
where \( C \) is the circumference and \( d \) is the diameter. Given that the diameter \( d \) is 64 and using \( \pi \) as 3.14:
\[ C = 3.14 \times 64 \]
Calculating that:
\[ C = 3.14 \times 64 = 200.96 \]
So, the approximate circumference of the circle is 200.96.