A factory uses 14 tons of coal per day after adopting new technology. In this way, the coal used for 7 days can now be used for 10 days. How many tons of coal can this factory save every day compared with the past?
某工厂采用新技术后，每天用煤14吨．这样原来7天用的煤，现在可以用10天，这个厂现在比过去每天节约多少吨煤？
<gadget id="calculator">10 / 7</gadget>
<output>10/7 = around 1.428571</output>

<gadget id="calculator">14 * (10/7)</gadget>
<output>20</output>

<gadget id="calculator">20 - 14</gadget>
<output>6</output>

<result>6</result>