Find a cube of iron with an edge length of 1 decimeter and melt it into a rectangular parallelepiped iron bar with a width of 4 cm and a height of 2 cm. What is the length of this iron bar in centimeters?
找一个棱长1分米的正方体铁块熔制成一个宽4厘米，高2厘米的长方体铁条．这个铁条的长是多少厘米？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">10 / 8</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">1 * 10 * 1 * 10 * 1 * (5/4)</gadget>
<output>125</output>

<result>125</result>