It is known that A=2*3*3*3*3*5*5*7, among the two-digit factors of A, what is the largest.
已知A=2*3*3*3*3*5*5*7，在A的两位数的因数中，最大的是多少．
<gadget id="calculator">5 * 3 * 3 * 2</gadget>
<output>90</output>

<result>90</result>