A and B represent two different positive integers. A is an even number and satisfies: A*A=B*135. What is the minimum value of A?
甲、乙代表互不相同的2个正整数，其中甲是偶数，且满足：甲*甲=乙*135，那么甲的最小值是多少．
<gadget id="calculator">2 * 5 * 3 * 3</gadget>
<output>90</output>

<result>90</result>