A total of 54 kilograms of apples and pears were purchased in the store, and apples accounted for (2/9). Later, some apples were bought. At this time, the apples accounted for 40% of the total weight of the two fruits. How many kilograms of apples were bought later?
商店购进苹果、梨共54千克，苹果占(2/9)．后来又买进一些苹果，这时苹果占两种水果总重量的40%，后来买进的苹果是多少千克？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(7/9) / (3/5)</gadget>
<output>35/27 = around 1.296296</output>

<gadget id="calculator">54 * (35/27)</gadget>
<output>70</output>

<gadget id="calculator">70 - 54</gadget>
<output>16</output>

<result>16</result>