In the eight-digit number composed of eight numbers from 1 to 8 without repeating numbers, how many numbers on each number are alternately odd and even.
由1～8这八个数码组成的无重复数字的八位数中，各数位上的数码是奇偶相间的有多少个．
<gadget id="calculator">4 * 4 * 3 * 3 * 2 * 2 * 1 * 1 * 2</gadget>
<output>1_152</output>

<result>1_152</result>