A cube iron block with a length of 10 cm is forged into a cuboid iron bar with a width of 5 cm and a height of 20 cm. What is the length of this iron bar?
把一块长10厘米的正方体铁块，锻造成宽5厘米，高20厘米的长方体铁条，这条铁条的长是多少？
<gadget id="calculator">5 * 20</gadget>
<output>100</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">10 * 10 * (1/10)</gadget>
<output>10</output>

<result>10</result>