First find the number of inches in each flight of stairs: 12 steps * 8 inches/step = <<12*8=96>>96 inches

Then find the net number of flights of stairs Jack went down: 6 flights - 3 flights = <<6-3=3>>3 flights

Then multiply than number by the number of inches per flight to find how many inches further down he is: 96 inches/flight * 3 flights = <<96*3=288>>288 inches

Then divide that number by 12 to find the number of feet down he is: 288 inches / 12 inches/foot = <<288/12=24>>24 feet

# Answer

24
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Jack goes up three flights of stairs, then down six flights of stairs. If each flight of stairs has 12 steps that each each 8 inches high, how many feet further down is Jack than when he started?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
24
Jack goes up three flights of stairs, then down six flights of stairs. If each flight of stairs has 12 steps that each each 8 inches high, how many feet further down is Jack than when he started?
train