To melt and cast a cylindrical iron block with a base radius of 3 decimeters and a height of 5 decimeters into a cone with a diameter of 4 centimeters and a height of 3 centimeters, how many can be cast?
要将一个底面半径是3分米，高5分米的圆柱体铁块，熔铸成直径4厘米，高3厘米的圆锥，能铸造多少个？
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 ** 2</gadget>
<output>900</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">3.14 * 900 * 50</gadget>
<output>141_300</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 3</gadget>
<output>12.56</output>

<gadget id="calculator">141_300 / 12.56</gadget>
<output>11_250</output>

<result>11_250</result>