How many even numbers can be formed with the five numbers 0, 1, 2, 3, and 4 without repeating numbers?
用0、1、2、3、4这五个数字可以组成多少个没有重复数字的偶数．
<gadget id="calculator">12 + 18</gadget>
<output>30</output>

<gadget id="calculator">24 + 36</gadget>
<output>60</output>

<gadget id="calculator">3 + 10 + 30 + 60 + 60</gadget>
<output>163</output>

<result>163</result>