After adopting new technology, a chemical factory uses 18 tons of raw materials every day, so the raw materials used in the past 6 days can now be used for 10 days. How many tons of raw materials can this factory save per day compared with the past?
某化工厂采用新技术后，每天用原料18吨，这样原来6天用的原料，现在可以用10天，这个厂现在比过去每天节约多少吨原料？
<gadget id="calculator">10 / 6</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">18 * (5/3)</gadget>
<output>30</output>

<gadget id="calculator">30 - 18</gadget>
<output>12</output>

<result>12</result>