Give the step-by-step reasoning process and then the final answer. Dream's car consumes 4 gallons of gas per mile. If she drives 400 miles today and 200 more miles tomorrow than today, how many gallons of gas will the car consume?
If she drives 400 miles today, the car will have consumed 4 * 400 = 1600 gallons of gas. Tomorrow, if she drives 200 more miles, the total distance will be 200 + 400 = 600 miles. The fuel consumption by the car tomorrow is 4 * 600 = 2400 gallons. The car's total fuel consumption in the two days is 2400 + 1600 = 4000 gallons.
The final answer: 4000.