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 of the circle.
Given that the diameter \( d \) is 20 and using \( \pi \approx 3.14 \):
\[ C = 3.14 \times 20 \] \[ C = 62.8 \]
Thus, the approximate circumference of the circle is 62.8.