How many of (2/3), (5/7), (4/9) and (3/8) can be transformed into finite decimals
在(2/3)、(5/7)、(4/9)和(3/8)中能化成有限小数的有多少
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>