Cast a cylindrical iron block whose base radius and height are 2 decimeters into a square steel whose cross section is 2 decimeters in length, how many decimeters is the length of this square steel?
把一块底面半径和高都是2分米的圆柱形铁块铸造成一块横截面是边长为2分米的方钢，这块方钢的长是多少分米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

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

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3.14 * 4 * (1/2)</gadget>
<output>6.28</output>

<result>6.28</result>