The school cafeteria used 95 tons of coal last year, and this year it used 20% less coal than last year. How many tons of coal are used this year?
学校食堂去年用去煤95吨，今年用去的比去年节约20%，今年用煤多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">95 * (4/5)</gadget>
<output>76</output>

<result>76</result>