If the prime factors of a composite number contain all odd numbers up to 10, what is the smallest composite number?
一个合数的质因数含有10以内所有的奇数，这个合数最小是多少．
<gadget id="calculator">1 * 3 * 5 * 7 * 9</gadget>
<output>945</output>

<result>945</result>