The sum of two natural numbers is 200, what is the largest product of these two natural numbers?
两个自然数的和是200，这两个自然数的乘积最大是多少．
<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>

<result>10_000</result>