There is a bag of rice in the cafeteria, eat it (1/8) on the first day, and eat the rest (2/7) on the second day. How much of this bag of rice will be eaten the next day?
食堂里有一袋米，第一天吃去它的(1/8)，第二天吃去剩下的(2/7)．第二天吃去这袋米的几分之几？
<gadget id="calculator">1 / 8</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">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(7/8) * (2/7)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>