A certain grain store sold 18 tons of rice last week, which was 1/5 more rice than flour. How many tons of flour did the grain store sell last week?
某粮店上周卖出大米18吨，卖出的大米比面粉多(1/5)，粮店上周卖出面粉多少吨？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">18 / (6/5)</gadget>
<output>15</output>

<result>15</result>