The school used (3/5) tons of coal in October, saving 12.5% compared to the plan. How many tons of coal is planned to be used in October?
学校十月份用煤(3/5)吨，比计划节约了12.5%，十月份计划用煤多少吨？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">12.5 / 100</gadget>
<output>0.125</output>

<gadget id="calculator">1 - 0.125</gadget>
<output>0.875</output>

<gadget id="calculator">(3/5) / 0.875</gadget>
<output>0.685714</output>

<result>0.685714</result>