1+2+3+4+5+...+100000000=how much.
1+2+3+4+5+…+100000000=多少．
<gadget id="calculator">1 + 100_000_000</gadget>
<output>100_000_001</output>

<gadget id="calculator">100_000_000 / 2</gadget>
<output>50_000_000</output>

<gadget id="calculator">100_000_001 * 50_000_000</gadget>
<output>5_000_000_050_000_000</output>

<result>5_000_000_050_000_000</result>