awk -v country=$1 '
# info - print information about country
#    usage: info country-name

BEGIN { FS = "\t" }

$1 ~ country {
    printf("%s:\n", $1)
    printf("\t%d million people\n", $3)
    printf("\t%.3f million sq. km.\n", $2/1000)
    printf("\t%.1f people per sq. km.\n", 1000*$3/$2)
}
' countries
