approximately how many cubic feet of water are needed to fill a circular swimming pool that is 40 feet across and 7 feet deep?
Choose the correct choice from the following options:
A) 700
B) 1500
C) 3000
D) 5000
E) 9000
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">pi * (20 ** 2) * 7</gadget>
<output>2800*pi = around 8_796.45943</output>

<result>E</result>
approximately how many cubic feet of water are needed to fill a circular swimming pool that is 40 feet across and 7 feet deep?
volume_cylinder(divide(40, const_2), 7)
"answer should be e . v = \ pir ^ 2 h = \ pi * 20 ^ 2 * 7 = approximately 9000"