Answer based on context:

In week 5 the Lions hosted the St. Louis Rams. The Lions started the scoring early with a 30-yard Jason Hanson field goal. The Rams tied it up at the end of the first quarter with a 28-yard field goal by Josh Brown. To start the second quarter, the Lions took the lead with a 105-yard kickoff return by Stefan Logan, the longest touchdown run in the NFL this season. The Lions added to their lead a few minutes later with a 1-yard TD catch by Calvin Johnson. The Rams kicked another 28-yard field goal a few minutes later. The Lions made it 24-6 just before halftime with a 3-yard TD catch by Brandon Pettigrew. The Lions' defense shut out the Rams in the second half. The only score of the third quarter was a 26-yard TD catch by Nate Burleson. In the fourth quarter the Lions kicked 2 field goals: from 48 then from 47. The Lions capped off their victory with a 42-yard interception return TD by Alphonso Smith.  With the win, not only did the Lions improve to 1-4, but it was their largest margin of victory since 1995 and their first win since November 22, 2009.

How many yards of field goals were kicked in the first half?
86