Use number cards 2, 4, 6, 0 and a decimal point. ． How many different three-digit decimals can be placed.
用数字卡片2、4、6、0和小数点．．可以摆多少个不同的三位小数．
<gadget id="calculator">3 * 2 * 1 * 4</gadget>
<output>24</output>

<result>24</result>