"Huimin" supermarket sold 1800kg of rice last week, which was 1/9 more than flour. How many kilograms of flour were sold last week?
"惠民"超市上周卖出大米1800kg，比面粉多(1/9)，上周卖出面粉多少千克？
<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">1_800 / (10/9)</gadget>
<output>1_620</output>

<result>1_620</result>