How much would it cost in gas to drive 700 miles at 22 mpg?

```

Cost = (Distance / MPG) * Cost per gallon

```

In this case, the distance is 700 miles, the MPG is 22, and the average cost of gas is $4 per gallon.

Plugging these values into the formula, we get:

```

Cost = (700 / 22) * 4 = $127.27

```

Therefore, it would cost approximately $127.27 in gas to drive 700 miles at 22 MPG.