A cube steel billet with edge length 10cm can be forged into a cuboid steel with height and width both 5cm. Ask: How long is the forged cuboid steel?
一个棱长10cm的正方体钢坯，能锻造成高和宽都是5cm的长方体钢材．求：锻造的长方体钢材有多长？
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">10 / 25</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">10 * 10 * (2/5)</gadget>
<output>40</output>

<result>40</result>