The fruit store shipped more apples than bananas (1/9). After the apples were sold (5/7), there were 80 kilograms left. How many bananas did the fruit store ship?
水果店运来的苹果比香蕉多(1/9)，苹果卖出(5/7)后，剩下80千克，水果店运来香蕉多少？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

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

<gadget id="calculator">80 / (2/7) / (8/9)</gadget>
<output>315</output>

<result>315</result>