A section of square steel has a cross-section of a square with a side length of 5 decimeters, and the length of the square steel is 6 meters. If the square steel weighs 7.8 kilograms per cubic decimeter, how many kilograms does this section of square steel weigh?
一段方钢，横截面是边长为5分米的正方形，方钢长6米，如果每立方分米方钢重7.8千克，这段方钢重多少千克？
<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<gadget id="calculator">60 * 5 * 5 * 7.8</gadget>
<output>11_700</output>

<result>11_700</result>