Five square steel billets with a side length of 6 decimeters are re-cast into a rectangular steel billet with a cross-sectional area of 18 square meters. How long is the cast rectangular steel billet?
5块棱长6分米的正方体钢坯，重新溶铸成一个横截面积18平方米的长方体钢坯，铸成的长方体钢坯有多长？
<gadget id="calculator">18 * 100</gadget>
<output>1_800</output>

<gadget id="calculator">5 / 1_800</gadget>
<output>1/360 = around 0.002778</output>

<gadget id="calculator">6 * 6 * 6 * (1/360)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>