A certain school used 56 tons of water in September, and saved (1/7) in October compared with September. How many tons were saved?
某校九月份用水56吨，十月份比九月份节约了(1/7)，节约了多少吨？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">56 * (1/7)</gadget>
<output>8</output>

<result>8</result>