Use 0, 2, 3, 5 four number cards to form two digits, how many different arrangements are there?
用0、2、3、5四个数字卡片摆成两位数，共有多少种不同的摆法．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">1 * 3</gadget>
<output>3</output>

<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<result>9</result>