pile of sand has a base diameter of 10 decimeters and a height of 6 decimeters. How many cubic decimeters is this sand?
一堆沙子，它的底面直径是10分米，高6分米．这样沙子有多少立方分米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">(1/3) * 3.14 * 25 * 6</gadget>
<output>157</output>

<result>157</result>