Take two numbers out of the 100 numbers 1, 2, 3, 4, ... 100, so that the sum of these two numbers can be divisible by 4, how many different ways are there at most?
在1，2，3，4，…100这100个数中取出两个数，使这两个数的和能被4整除，最多有多少种不同的取法．
<gadget id="calculator">25 * 24</gadget>
<output>600</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">600 / 2</gadget>
<output>300</output>

<gadget id="calculator">25 * 25</gadget>
<output>625</output>

<gadget id="calculator">300 + 625 + 300</gadget>
<output>1_225</output>

<result>1_225</result>