A number is the product of two 2s, three 3s, one 5, and two 7s. What is the largest two-digit number among the divisors of this number?
一个数是2个2，3个3，1个5，2个7连乘的积，这个数的约数中，最大的两位数是多少．
<gadget id="calculator">2 * 3 * 3 * 5</gadget>
<output>90</output>

<result>90</result>