A rectangular steel plate is 4 meters long, 3 meters wide, and weighs 540 kilograms. How many kilograms does the steel plate weigh per square meter? (column equation solution)
一块长方形钢板长4米，宽3米，重540千克，每平方米钢板重多少千克？(列方程解答)
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">540 / 12</gadget>
<output>45</output>

<result>45</result>