The engineering team excavated a 1,000-meter-long cave, 20 meters per day for the first 10 days, and 25 meters per day for the rest. How many days will it take to complete the excavation?
工程队开凿一条长1000米的山洞，前10天每天开凿20米，余下的每天开凿25米，还要几天开凿完？
<gadget id="calculator">10 * 20</gadget>
<output>200</output>

<gadget id="calculator">1_000 - 200</gadget>
<output>800</output>

<gadget id="calculator">800 / 25</gadget>
<output>32</output>

<result>32</result>