In such cases, it the easiest to understand may be long division of 646.58 by 22#. Let us do it
color(white)(xxxxxx)2color(white)(X)9. color(white)(x)3color(white)(x)9
color(white)(xx) 22| bar(6color(white)(x)4color(white)(x) 6.)color(white)(x)5color(white)(x) 8
color(white)(xxxxx)ul(4color(white)("x)4)color(red)(darr
color(white)(xxxxx)2color(white)(x) "0"color(white)(x)6
color(white)(xxxxx)ul(1 color(white)(x)9color(white)(x)8
color(white)(xxxxxxxX)8color(white)(x)5
color(white)(xxxxxxxx)ul(6 color(white)(x)6)"
color(white)(xxxxxxxx)1color(white)(x)9color(white)(x)8
color(white)(xxxxxxxx)ul(1 color(white)(x)9color(white)(x)8
color(white)(xxxxxxxxxxx) 0
As the remainder is 0, the quotient is 29.39 i.e. 646-:22=29.39.