The fertilizer plant used 7,200 tons of coal last year, which was 1/9 more than this year. How many tons of coal will be used this year?
化肥厂去年用煤7200吨，比今年多(1/9)．今年用煤多少吨？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 + (1/9)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">7_200 / (10/9)</gadget>
<output>6_480</output>

<result>6_480</result>