A piece of steel with a base area of 12 square decimeters and a weight of 702 kilograms is known to weigh 7.8 kilograms per cubic decimeter. How many decimeters is this piece of steel?
一块底面积是12平方分米，重702千克的钢材，已知每立方分米的钢材重7.8千克，这块钢材长多少分米？
<gadget id="calculator">702 / 7.8 / 12</gadget>
<output>7.5</output>

<result>7.5</result>