Among fractions (7/20), 1(1/8), (12/15), (3/14), how many fractions cannot be reduced to finite decimals.
在分数(7/20)、1(1/8)、(12/15)、(3/14)中，不能化为有限小数的是多少．
<gadget id="calculator">3 / 14</gadget>
<output>3/14 = around 0.214286</output>

<result>3/14 = around 0.214286</result>