有学者谈到“坊巷的开放，坊市的混一，展现了宋代城市管理以经济生活为主旋律的开放的特点，显示了宋朝的城市管理不再如唐代那样以政治管理和治安管理为最重要目的。”材料主要说明宋朝（   ）

阅读短文，根据短文内容，选择正确答案。

Bob: Hello, Candy! What are you going to do on Sunday?

Candy: Oh, I'm going to the park to have a picnic.        

Bob: Do you like having a picnic?

Candy: Yes, I do. What about you?

Bob: Me, too. But my favourite hobby is playing computer games.

I think it's very fun.

Candy: D o you want to go with us?

Bob: Sure. What time?

Candy: At 8:00 o'clock tomorrow.

Bob: OK. See you later.

Candy: See you.

495×5    1800

504×6    2500

386×7    2400

290×8    1200

207×9    2800

318×4    3000

1080×9=____