If a number is smaller than 100 million, add another 300,000 to exactly 100 million. What is this number?
一个数比一亿小，再增加30万，正好是一亿，这个数是多少．
<gadget id="calculator">30 * 10_000</gadget>
<output>300_000</output>

<gadget id="calculator">100_000_000 - 300_000</gadget>
<output>99_700_000</output>

<result>99_700_000</result>