Grandpa Li has to do three things after waking up every morning. He spends 20 points listening to the news, 8 points for washing, and 15 points for eating breakfast. How many points does he need at least to finish these things?
李爷爷每天早晨起床后要做三件事，听新闻用20分，洗漱用8分，吃早餐用15分，他做完这些事至少需要多少分．
<gadget id="calculator">8 + 15</gadget>
<output>23</output>

<result>23</result>