Question

convert 6.4 m to dam

Answer 1

$\red{Question:}$6.4m --> dam

$\mathfrak{Divide \:it \:by \:10}$As, 1m = 0.1dam

$\frac{6.4}{10}$

$<marquee>0.64dam is your answer.$

Answer 2

as we know...
1 m = 0.1 dam
6.4 m = ( 6.4 x 0.1 ) dam
= 64 / 10 x 1 / 10
= 64 / 100
= 0.64 dam