If the bottle is 30cm high, it contains 500mL of oil. The oil level is 20cm high. If it is turned upside down, the oil level will be 26cm high. What is the volume of this bottle in milliliters?
如果瓶子高30cm，里面装了500mL油．油面高20cm，将其倒置，则油面高26cm，那么这个瓶子的容积是多少毫升？
<gadget id="calculator">500 / 20</gadget>
<output>25</output>

<gadget id="calculator">30 - 26</gadget>
<output>4</output>

<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<gadget id="calculator">25 * 24</gadget>
<output>600</output>

<result>600</result>