the diameter of a circle is 4 / π. find the circumference of the circle.  Choose the correct choice from the following options
A) 8 B) 4 π C) 4 D) 6 E) 5
<gadget id="calculator">4 / pi</gadget>
<output>4/pi = around 1.27324</output>

<gadget id="calculator">2 * pi * (4/pi)</gadget>
<output>8</output>

<result>A</result>
the diameter of a circle is 4 / π. find the circumference of the circle.
circumface(divide(4, const_pi))
circumference = 2 * pi * r = 2 * pi * 4 / pi = > 8 a