How long can you forge a rectangular steel block with a width of 2.5 decimeters and a height of 2 decimeters by forging a cube steel with a side length of 5 decimeters?
把一个棱长为5分米的正方体钢材锻造成一个宽2.5分米，高2分米的长方体钢块，能锻造多长？
<gadget id="calculator">2.5 * 2</gadget>
<output>5</output>

<gadget id="calculator">5 / 5</gadget>
<output>1</output>

<gadget id="calculator">5 * 5 * 1</gadget>
<output>25</output>

<result>25</result>