Context: The Browns then traveled to Chicago to take on the Bears.  In the first quarter, the Bears scored first when Jordan Howard ran for a 2-yard touchdown (with a failed PAT) to make it 6-0.  In the second quarter, the Browns scored when Zane Gonzalez kicked a 48-yard field goal to make it 6-3 at halftime.  In the third quarter, it was all Bears when Howard ran for a 16-yard touchdown to make it 13-3.  This would be followed by Mitchell Trubisky's 4-yard run for a touchdown to make it 20-3.  With the fourth quarter scoreless, this would be the final score of the game. With the loss, the Browns dropped their 16th straight game and their 20th consecutive road game.  They became the first team to start 0-15 since the 2008 Lions. They also became the first franchise in the NFL to ever have multiple seasons with 15 or more losses. The loss also secured the #1 overall draft pick for a second year in a row. They're the first team since the 1999 Browns and 2000 Browns to have the #1 overall pick in back-to-back drafts.

Question: How many points were the Bears winning by at halftime?

Answer:
3