Use the three number cards 2, 3, and 4 to randomly draw two cards to form a two-digit number. How likely is this two-digit number to be an even number?
用2、3、4三张数字卡片任意抽出两张，组成两位数，这个两位数是双数的可能性多少．
<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>