John skateboarded for 10 miles and then walked another 4 miles to the park. He then skated all the way back home. How many miles has John skateboarded in total?
John traveled 10 + 4 = <<10+4=14>>14 miles to the park.
His round trip would take 14 x 2 = <<14*2=28>>28 miles.
If you subtract the 4 miles he walked then John traveled 28 - 4 = <<28-4=24>>24 miles.
#### 24