How many fractions (5/8), (9/36), (2/6), (7/16), (9/12) cannot be reduced to finite decimals.
分数(5/8)、(9/36)、(2/6)、(7/16)、(9/12)中，不能化成有限小数有多少．
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>