Wheat on the farm is usually piled up in a conical shape. Wang Dabai made this estimate of his own wheat production. He first used a rope around the bottom to measure the length of the rope 6.28 meters, and then stuck a bamboo pole to the top and inserted it vertically to measure the wheat. The height of the pile is about 2 meters. If each cubic meter of wheat weighs 750 kilograms, please help him calculate how many kilograms of wheat will be harvested this year?
农场上小麦一般都堆成圆锥形状，王大柏对自家的小麦产量作了这样的估算，他先用绳子绕着底面一圈量出绳长6.28米，又用竹竿贴顶点垂直插下，量得麦堆高大约2米，如果每立方米小麦重750千克，请你帮他算一算，今年共收小麦多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 2 * 750</gadget>
<output>1_570</output>

<result>1_570</result>