The pillars in the school corridor are 3 meters high and the circumference of the bottom surface is 3.14 meters. If you paint 100 such pillars, you can paint 2 square meters per kilogram of paint. How many kilograms of paint will be used in total?
学校走廊的柱子高3米，底面周长3.14米，给100根这样的柱子刷油漆，每千克油漆可以漆2平方米，一共要用油漆多少千克？
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">3.14 * 3 * 50</gadget>
<output>471</output>

<result>471</result>