It is known that x and y are different integers, and, x+y=200, what is the maximum product of x and y.
已知x和y是不同的整数，并且，x+y=200，x和y的最大积是多少．
<gadget id="calculator">99 * 101</gadget>
<output>9_999</output>

<result>9_999</result>