Cast a cylindrical steel material whose base circumference is 25.12cm and height is 125cm into a rectangular steel material whose base length is 5cm. How long is the cast rectangular steel material?
把一个底面周长是25.12cm、高是125cm的圆柱形钢材铸造成底面边长都为5cm的长方形钢材，铸造出的长方体钢材有多长？
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<gadget id="calculator">125 / 25</gadget>
<output>5</output>

<gadget id="calculator">3.14 * 16 * 5</gadget>
<output>251.2</output>

<result>251.2</result>