A conical sand pile is 7.2 meters high, the bottom circumference is 31.4 meters, and it weighs 1.5 tons per cubic meter. Now if 60% of this pile of sand is used up, how many tons of sand are left?
一个圆锥形沙堆高7.2米，底面周长是31.4米，每立方米重1.5吨．现如果用去这堆沙的60%，还剩多少吨沙？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 7.2</gadget>
<output>188.4</output>

<gadget id="calculator">188.4 * 1.5</gadget>
<output>282.6</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">282.6 * (2/5)</gadget>
<output>113.04</output>

<result>113.04</result>