Using "ten thousand" as the unit, what is the maximum difference between the exact number of 300,000 and the approximate number of 300,000.
用"万"作单位，精确数30万与近似数30万比较最多相差多少．
<gadget id="calculator">30 * 10_000</gadget>
<output>300_000</output>

<gadget id="calculator">300_000 - 295_000</gadget>
<output>5_000</output>

<result>5_000</result>