A batch of apples sells 10 kilograms, which happens to be (5/9) of this batch of apples. How many kilograms does this batch of apples have?
一批苹果，卖掉10千克，正好是这批苹果的(5/9)，这批苹果有多少千克？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">10 / (5/9)</gadget>
<output>18</output>

<result>18</result>