Take some numbers out of the 100 natural numbers 1, 3, 5, 7..., 199. So that among the numbers taken out, none of the numbers is an integer multiple of the other number. How many such numbers can be extracted at most.
从1，3，5，7…，199这100个自然数中取出若干个数．使得在所取出的数中，任何一个数都不是另一个数的整数倍．这样的数最多能取出多少个．
<gadget id="calculator">100 - 33</gadget>
<output>67</output>

<result>67</result>