How many ways are there to take two numbers from the natural numbers from 1 to 100 to make their sum greater than 100?
从1到100的自然数中取出两个数，要使它们的和大于100，共有多少种取法？
<gadget id="calculator">50 * 49</gadget>
<output>2_450</output>

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

<gadget id="calculator">2_450 / 2</gadget>
<output>1_225</output>

<gadget id="calculator">50 * 51</gadget>
<output>2_550</output>

<gadget id="calculator">2_550 / 2</gadget>
<output>1_275</output>

<gadget id="calculator">1_225 + 1_275</gadget>
<output>2_500</output>

<result>2_500</result>