1+2+3+4+5+6+7+...+99=how much.
1+2+3+4+5+6+7+…+99=多少．
<gadget id="calculator">99 + 1</gadget>
<output>100</output>

<gadget id="calculator">99 / 2</gadget>
<output>99/2 = around 49.5</output>

<gadget id="calculator">100 * (99/2)</gadget>
<output>4_950</output>

<result>4_950</result>