A steel bar has a cross-sectional area of 6 square centimeters and a length of 12 meters. If the steel bar weighs 7.8 kilograms per cubic decimeter, how many kilograms does this steel bar weigh?
一根钢筋，横截面积是6平方厘米，长12米，如果每立分米钢筋重7.8千克，这根钢筋重多少千克？
<gadget id="calculator">6 / 100</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<gadget id="calculator">(3/50) * 120 * 7.8</gadget>
<output>56.16</output>

<result>56.16</result>