Two hands, eight hands! Two hands, seven hands! ? Two hands, seven hands! Two hands, four hands! ,

=2 hands 8×2 hands 7×2 hands 4×…× 3× 2 hands 2 hands 7×2 hands 4×2 hands 8×…× 3× 2 hands -2 hands 7×2 hands 4×2 hands 8×…× 3× 2 hands 2 hands 4.

=2 hands 8-2 hands 7,

= hand.

So the answer is: hands.