A cylindrical steel bar has a cross-sectional area of 12.5cm**2 and a length of 4m. What is the volume of this piece of steel? ．
一根圆柱形钢材，横截面的面积是12.5cm**2，长是4m．这根钢材的体积是多少？．
<gadget id="calculator">4 * 100</gadget>
<output>400</output>

<gadget id="calculator">12.5 * 400</gadget>
<output>5_000</output>

<result>5_000</result>