In a pasture, the number of sheep is 800, which is less than the number of cattle (1/9). How many cattle are there in the pasture?
一个牧场，羊的只数是800只，比牛的头数少(1/9)，牧场养牛多少头？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 - (1/9)</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">800 / (8/9)</gadget>
<output>900</output>

<result>900</result>