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 20, and using \( \pi \approx 3.14\), we can calculate:
\[ C = 3.14 \times 20 \]
Calculating this:
\[ C = 62.8 \]
Therefore, the approximate circumference of the circle is 62.8.