A piece of square steel is 5 meters long and its cross section is a square with side length 3 cm. What is the volume of this piece of square steel in cubic meters?
一段方钢长5米，横截面是一个边长3厘米的正方形，这段方钢的体积是多少立方米？
<gadget id="calculator">3 / 100</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">(3/100) * (3/100) * 5</gadget>
<output>9/2_000 = around 0.0045</output>

<result>9/2_000 = around 0.0045</result>