You are planning a trip to Yellowstone National Park, and know that you can save money by driving and staying with family along the way. The first leg of your journey will be 426 miles from Portland, OR to Boise, ID where your aunt lives. After visiting with her, you will drive 388 more miles to Yellowstone. Estimate the number of miles you will drive to get to Yellowstone National Park by first rounding to the tens place.