A fruit shop shipped a batch of fruits, including 400 kg of bananas, the quality of oranges was that of bananas (9/10), and the quality of apples was that of oranges (8/9). How many kilograms of apples did the fruit shop ship?
某水果店运来一批水果，其中香蕉400千克，橘子的质量是香蕉的(9/10)，苹果的质量是橘子的(8/9)．水果店运来苹果多少千克？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">400 * (9/10) * (8/9)</gadget>
<output>320</output>

<result>320</result>