Typical driveshaft to axle gear ratio for high gear?

Here is what you fail to realise Most modern transmissions have over drive like 1.25 revs to one of the engine. And rear end gear is about 3 turns to 4 turns of the drive shaft to one of the tire. When calculating horsepower the DYNO you use the one to one gear manual it is fourth gear automatics it some times is 3rd or fourth.