The number 300.000000000 in word form is "three hundred." The decimal portion, consisting solely of zeros, does not affect the value, so it is typically omitted in word form.
The wordform for 5.9 is Five and 9 Tenths.
3.7 in wordform is "three point seven."
300000000000 cents
2,700,000,000,000
nine tenths
300000000000
Thirty eight.
300000000000 a year!!
3x108
Three hundred billion
12 is spelled twelve.
Six tenths