In the formula 2/5, 10/3, 17/8, how many quotients are recurring decimals.
在算式2/5，10/3，17/8中，多少的商是循环小数．
<gadget id="calculator">10 / 3</gadget>
<output>10/3 = around 3.333333</output>

<result>10/3 = around 3.333333</result>