Calculation: 999999*999999+1999999=how much.
计算：999999*999999+1999999=多少．
<gadget id="calculator">999_999 * 999_999</gadget>
<output>999_998_000_001</output>

<gadget id="calculator">999_998_000_001 + 1_999_999</gadget>
<output>1_000_000_000_000</output>

<result>1_000_000_000_000</result>