Forge two square steel blocks with a side length of 2 decimeters into a square steel block with a cross-section side length of 2 cm. Find the length of the forged steel bar in centimeters.
把两块棱长2分米的正方体钢块，锻造成一个横截面边长2厘米的正方形的长方体钢块，求锻造的钢条长多少厘米．
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 * 20 * 20</gadget>
<output>8_000</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8_000 * (1/2)</gadget>
<output>4_000</output>

<result>4_000</result>