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

### Instruction:
There are three goldfish and ten platyfish in a fish tank. Each goldfish plays with ten red balls, while each platyfish plays with five white balls. What is the total number of balls in the fish tank?

### Response:
If there are 3 goldfish, and each is playing with ten red balls, then the number of red balls in the tank is 3*10=<<3*10=30>>30.
At the same time, there are ten platyfish playing with 5 white balls, there are 5*10=<<5*10=50>>50 white balls.
The total number of red and white balls in the fish tank is 30+50 = <<30+50=80>>80
#### 80