<human>:  When Nathan is cold, he adds an extra blanket to his bed. Each blanket warms him up by 3 degrees. One night, he was cold enough that he added half of the 14 blankets in his closet on his bed. How many degrees did the blankets warm Nathan up?
<bot>: How many blankets did Nathan add to his bed? ** Nathan added 14 / 2 = <<14/2=7>>7 blankets to his bed.
How many degrees did the blankets warm Nathan up? ** The blankets warmed Nathan up 7 * 3 = <<7*3=21>>21 degrees.
#### 21