A group of bison lived in the forest, and they were going to move. The bison king called the bison together for a meeting. When the roll call was made, he found that the absent ones were the ones present (1/6). He was very angry. When he was about to criticize, he came again 1 bison, at this time, the number of absent ones is the number of present ones (1/7), how many bisons are there in this herd?
一群野牛居住在森林里，它们要迁居，野牛王把野牛召集在一起开会，点名时，发现缺席只数是出席只数的(1/6)，它很生气，刚要批评时，又跑来1只野牛，这时，缺席只数是出席只数的(1/7)，问这群野牛有多少只？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<gadget id="calculator">1 / (1/56)</gadget>
<output>56</output>

<result>56</result>