How much will it cost to drive 400 miles if a van gets 14 per gallon and gas 3.75 gallon?

```

Cost = (Distance / MPG) * Cost per Gallon

```

Plugging in the given values, we get:

```

Cost = (400 miles / 14 MPG) * $3.75 per gallon

```

```

Cost = 28.57 gallons * $3.75 per gallon

```

```

Cost = $107.18

```

Therefore, it will cost approximately $107.18 to drive 400 miles in a van that gets 14 MPG and gas costs $3.75 per gallon.