Randomly choose two numbers from 2, 3, and 5 as the numerator and denominator of the fraction. How many fractions are there in total?
从2、3、5中任意选出两个数字分别作为分数的分子和分母，一共有多少个分数？
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>