batch of apples is divided into 20 baskets, if each basket contains more (1/9), how many baskets can be saved.
一批苹果分装在20个筐内，如果每筐多装(1/9)，可省多少个筐．
<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">20 / (10/9)</gadget>
<output>18</output>

<gadget id="calculator">20 - 18</gadget>
<output>2</output>

<result>2</result>