How many three-digit even numbers can be formed with 0, 1, 2, 5, and 6 without repeating digits?
用0、1、2、5、6能组成多少个没有重复数字的三位偶数．
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 * 3 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 18</gadget>
<output>30</output>

<result>30</result>