How many even numbers are there among the non-repeating three-digit numbers composed of the numbers 0, 1, 2, 3, 4, 5, and 6?
用数字0，1，2，3，4，5，6组成的没有重复的三位数中，偶数有多少个．
<gadget id="calculator">30 + 75</gadget>
<output>105</output>

<result>105</result>