You've gotten it backward: there are 3 teaspoons in 1 tablespoon.
[Or if you really want to know what you asked, there is 1/3 of a tablespoon in 1 teaspoon.]
That is 1.666 tablespoons.
19 tablespoons
There are 21 teaspoons in 7 tablespoons.
That is 4 tablespoons.
9 tsp in 3 tablespoons
That is 148.333 tablespoons.
1.66
That is approximately 2.666 tablespoons.
6 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
25 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
7.33 tablespoons or 7 tablespoons and 1 teaspoon 7.33 tablespoons or 7 tablespoons and 1 teaspoon
148.33 tbsp 1 tablespoon = 3 teaspoons 1 teaspoon = 0.33 tablespoon