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

### Instruction:
Billy is counting the rings in two trees. Weather fluctuations in this area mean that each tree's rings are in groups of two fat rings and four thin rings. If Billy counts 70 ring groups in the first tree and 40 ring groups in the second tree, how much older is the first tree? (Trees grow 1 ring per year.)

### Response:
There are 2 + 4 = <<2+4=6>>6 rings in each ring group.
The first tree has 70 * 6 = <<70*6=420>>420 rings, or 420 years.
The second tree has 40 * 6 = <<40*6=240>>240 rings, or 240 years.
The first tree is 420 - 240 = <<420-240=180>>180 years older.
#### 180