Put a bucket of boiling water in a water bottle. After filling 8 bottles, there is still (5/7) left in the bucket. If 10 bottles are filled, there is still 54 kilograms in the bucket. How many kilograms does this bucket of boiling water contain?
一桶开水，用水瓶去装，灌了8瓶后，桶内还剩下(5/7)，若灌了10瓶后桶内还剩下54千克，这桶开水原来有多少千克？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 - (5/7)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">8 / (2/7)</gadget>
<output>28</output>

<gadget id="calculator">28 - 10</gadget>
<output>18</output>

<gadget id="calculator">54 / 18</gadget>
<output>3</output>

<gadget id="calculator">3 * 28</gadget>
<output>84</output>

<result>84</result>