The sum of two different numbers is 160, what is the largest product of these two numbers?
两个不同的数的和是160，这两个数的乘积最大是多少．
<gadget id="calculator">160 / 2</gadget>
<output>80</output>

<gadget id="calculator">80 * 80</gadget>
<output>6_400</output>

<result>6_400</result>