Cast a square steel billet with a side length of 8c into a square bar with a side length of 8c. How many decimeters is the length of this steel?
把棱长为的正方形钢坯铸成横是边长8c的正方形的长方条，这个钢的长多少分米？
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * (4/5)</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">4 / (16/25)</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">4 * 4 * (25/4)</gadget>
<output>100</output>

<result>100</result>