"and how" in Chinese (Simplified)
当然！确实！
Definition
用于非常强烈地同意别人刚才说的话，相当于“当然”或“确实”。是口语中的强调回答。
Usage Notes (Chinese (Simplified))
非常口语化且常用于同意正面陈述后；略带地区色彩或复古感。通常跟随他人发言，不用于句首。
Examples
"It's cold today." "And how! I wish I had brought my coat."
“今天挺冷的。” “**当然**！早知道就带外套了。”
"You must be tired after that run." "And how! I need to sit down."
“你跑完一定累了吧。” “**当然**！我得坐一坐。”
"That test was difficult." "And how! I barely finished in time."
“那考试真难。” “**确实**！我差点没做完。”
"That was some party last night." "And how! I'm still tired."
“昨天晚上的派对真热闹。” “**当然**！我现在还累呢。”
"That movie was amazing!" "And how! I want to see it again."
“那部电影太棒了！” “**当然**！我还想再看一遍。”
"You finished the whole pizza by yourself?" "And how! I was starving."
“你一个人吃完了整张披萨？” “**当然**！我饿坏了。”