If there is a bucket of boiling water, use a jug of the same size to fill it. If 8 jugs are filled, there will be 6/7 of this bucket of water left in the bucket. If 7 jugs are filled, there will be 56 liters of water left in the bucket. The volume of each jug How many liters is it?
有一桶开水，用同样大小的水壶去装，如灌满8壶，桶内还剩这桶水的(6/7)，如果灌满7壶，桶内还剩56升水，每个水壶的容积是多少升？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">1 - (6/7)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/7) / 8</gadget>
<output>1/56 = around 0.017857</output>

<gadget id="calculator">(1/56) * 7</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">56 / (7/8)</gadget>
<output>64</output>

<gadget id="calculator">64 * (1/56)</gadget>
<output>8/7 = around 1.142857</output>

<result>8/7 = around 1.142857</result>