Using 1, 2, 3 to form different three-digit numbers, what is the probability that the formed number is an even number?
用1、2、3三个数字组成不同的三位数，则组成的数是偶数的可能性是多少
<gadget id="calculator">3 * 2 * 1</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

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