Translation of "Staggering" in Japanese

It's a staggering number.

驚くべき人数です

The numbers are staggering,

まったく驚くような数字ですが

You stand the axis on the base and then proceed to stack up each part, staggering their position.

台座に心棒を立てて、各パーツをずらしながら重ねていきます。