The sum of the two numbers A and B is 125, what is the maximum product of them?
甲乙两数的和是125，它们的乘积最大是多少．
<gadget id="calculator">125 / 2</gadget>
<output>125/2 = around 62.5</output>

<gadget id="calculator">(125/2) * (125/2)</gadget>
<output>15_625/4 = around 3_906.25</output>

<result>15_625/4 = around 3_906.25</result>