There is a kind of iron ore that can produce 3.52 tons of iron with 5.5 tons. According to this calculation, how many tons of this ore are needed to smelt 8 tons of iron?
有一种铁矿石5.5吨可以炼铁3.52吨，照这样计算，要炼8吨铁，需耍这种矿石多少吨？
<gadget id="calculator">5.5 / 3.52</gadget>
<output>1.5625</output>

<gadget id="calculator">1.5625 * 8</gadget>
<output>12.5</output>

<result>12.5</result>