What is the smallest among the four numbers (656/657), (52/53), (2679/2680), and (8/9).
在(656/657)，(52/53)，(2679/2680)，(8/9)四个数中最小的是多少．
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>