There is a section of square steel with a length of 2.5m, a width and a height of 2dm, how many kilograms does this section of square steel weigh? (One cubic decimeter of square steel weighs 7.8kg.)
有一段长2.5m，宽和高都是2dm的方钢，这段方钢重多少千克？(每立方分米的方钢重7.8kg．)
<gadget id="calculator">2.5 * 10 * 2 * 2 * 7.8</gadget>
<output>780</output>

<result>780</result>