A piece of cuboid steel is 1.2 meters long and its cross-section is a square with side length 2 cm. Steel weighs 7.8 kilograms per cubic decimeter. How many kilograms does this cuboid steel weigh?
一块长方体钢材，长1.2米，横截面是边长2厘米的正方形．每立方分米钢重7.8千克，这块长方体的钢材重多少千克？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1.2 * 10</gadget>
<output>12</output>

<gadget id="calculator">(1/5) * (1/5) * 12 * 7.8</gadget>
<output>3.744</output>

<result>3.744</result>