Answer: 18
Analysis: This level is a brain teaser level, which can be calculated by the idiom "It's a deal". One sentence is 9 ding, and the businessman said two sentences, that is, 18 ding.
1, when the player has the key, he can click the prompt in the upper left corner to get the game prompt, so as to pass the level he doesn't know very well, which will help the player to better cope with the difficulties;
You can also choose to skip this level first. You can see a skip button at the top. By skipping, players can save trouble, skip this level first and continue to play the next level.
3. You can get the key by watching the video advertisement, and you can watch the video after the entrance. A few tens of seconds of game video advertising can let you get the key necessary for the entrance, and the video can be seen in the lower right corner.