Brother Cat has 9 fish. After giving Brother Cat 1 fish, he still has 1 fish more than Brother Cat. How many fish did Brother Cat have?
猫哥哥有9条鱼，给了猫弟弟1条鱼后，还比猫弟弟多1条，猫弟弟原来有几条鱼？
<gadget id="calculator">9 - 1 - 1 - 1</gadget>
<output>6</output>

<result>6</result>