What is the sum of 49 even numbers 2, 4, 6, 8, ... 98?
2、4、6、8、…98这49个偶数的和是多少．
<gadget id="calculator">2 + 98</gadget>
<output>100</output>

<gadget id="calculator">49 / 2</gadget>
<output>49/2 = around 24.5</output>

<gadget id="calculator">100 * (49/2)</gadget>
<output>2_450</output>

<result>2_450</result>