Gear box

I made a gear box out of Lego Technic parts . It converts slow turning in to fast turning.

Now look at the picture.

 

A is a box, it hold everything together .
B is a handle to hold the box A.
C is a crank ,I turn it with my hand ,and it turn axle D.
D turns 40teeth gear E.

E turns 8 teeth F gear witch turn G 40 teeth gear , witch is on the same axle.

F is 8 teeth F gear turns g gear , witch is on the same axle.

G is a 40 teeth gear witch turns 8 teeth H gear , witch is on the same axel as 40 teeth I gear.

H is 8 teeth gear that turns 40 teeth gear I , witch is on the same axel.

I is 40 teeth gear , witch turns 24 teeth J gear.

J is 24 teeth gear , witch turns K axel.

K is axel , axel K turns wheel L.

L is wheel.

Gears F and G are 5x faster then gear E.

Gears H and I are 5x faster then Gear G.

Gear J is 1.5x faster then gear I.

All together, wheel L is 5x5x1.5 = 38 times faster than crank C.