Below is an instruction that describes a task. Write a response that appropriately completes the request in Thai. Please answer in Thai.

### Instruction:
1,800 fish swim westward, 3,200 swim eastward, and 500 swim north. What is the number of fish left in the sea, if fishers catch 2/5 of the fish that swam eastward and 3/4 of the fish that swam westward?

### Response:
 จำนวนปลาทั้งหมดคือ 1,800+3,200+500=<<1800+3200+500=6000>>6,000
จำนวนปลาที่ถูกจับคือ .8*1800+.6*3200=<<.8*1800+.6*3200=2720>>2,720
จำนวนปลาที่เหลือในทะเลคือ 6,000-2,720=<<6000-2720=3280>>3,280