A square steel plate with a side length of 8 meters weighs 70 kg per square meter. What is the weight of this steel plate?
一个边长为8米的正方形钢板，每平方米重70千克，这块钢板重多少．
<gadget id="calculator">8 * 8 * 70</gadget>
<output>4_480</output>

<result>4_480</result>