A square billet with a side length of 6 decimeters is re-cast into a rectangular billet with a cross-sectional area of 18 square meters. How long is the cast billet?
一块棱长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">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 18</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(3/5) * (3/5) * (1/30)</gadget>
<output>3/250 = around 0.012</output>

<result>3/250 = around 0.012</result>