There are some grapes weighing (7/8) kilograms. After eating (1/7), there are still (3/4) kilograms left. How many kilograms are eaten?
有一些葡萄重(7/8)千克，吃了(1/7)后，还剩(3/4)千克，吃了多少千克．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(7/8) - (3/4)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>