A is a prime number and B is a composite number. Their sum is 11. What is the maximum product of A and B?
甲是一个质数，乙是一个合数，它们的和是11，甲、乙两个数的积最大是多少
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>