Recursive equation calculation Seven and seven tenths × one and five ninths + 2.3 △ () (fill in the number that is not 1 or 0)

Recursive equation calculation Seven and seven tenths × one and five ninths + 2.3 △ () (fill in the number that is not 1 or 0)

Seven and seven tenths × one and five ninths + 2.3 (9 / 14)
=(7.7+2.3)*(14/9)
=140/9
=Fifteen and five ninths