How many different two-digit decimals can be formed by using the three numbers 1, 2, and 3 and the decimal point.
用1、2、3这三个数字和小数点，可以组成多少个不同的两位小数．
<gadget id="calculator">3 * 2 * 1</gadget>
<output>6</output>

<result>6</result>