Among the following three numbers, one of the numbers is different from the other two numbers, what is this number?
下面3个数中，有一个和其他两个数大小不一样，这个数是多少
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>