Answer :
8 x 64
= 8 x ( 60 + 4 )
= 8 x ( 6 x 10 + 4 )
= 8 x 6 x 10 + 8 x 4
= 48 x 10 + 32
= 480 + 32
= 480 + 20 + 12
= 500 + 12
= 512
= 8 x ( 60 + 4 )
= 8 x ( 6 x 10 + 4 )
= 8 x 6 x 10 + 8 x 4
= 48 x 10 + 32
= 480 + 32
= 480 + 20 + 12
= 500 + 12
= 512