Convert US teaspoon to UK gallon
Unit definitions
US teaspoon
$80$ US minims are equal to $1$ US teaspoon.
UK gallon
The UK gallon is a unit of volume equal to exactly $4.546\,09$ liters.
How to convert US teaspoon to UK gallon
$$\text{Volume}_{\text{gal (uk)}} = \text{Volume}_{\text{tsp (us)}} \cdot 0.001084211179277137056239537712627775$$
Examples
Example 1
Convert $50.0\ \text{tsp (us)}$ to $\text{gal (uk)}$.
$$\text{Volume}_{\text{gal (uk)}} = 50.0 \cdot 0.001084211179277137056239537712627775$$
$$\text{Volume}_{\text{gal (uk)}} = 0.054211$$
$$\therefore \ 50.0\ \text{tsp (us)} = 0.054211 \ \text{gal (uk)}$$
Example 2
Convert $85.0\ \text{tsp (us)}$ to $\text{gal (uk)}$.
$$\text{Volume}_{\text{gal (uk)}} = 85.0 \cdot 0.001084211179277137056239537712627775$$
$$\text{Volume}_{\text{gal (uk)}} = 0.092158$$
$$\therefore \ 85.0\ \text{tsp (us)} = 0.092158 \ \text{gal (uk)}$$
Example 3
Convert $110.0\ \text{tsp (us)}$ to $\text{gal (uk)}$.
$$\text{Volume}_{\text{gal (uk)}} = 110.0 \cdot 0.001084211179277137056239537712627775$$
$$\text{Volume}_{\text{gal (uk)}} = 0.119263$$
$$\therefore \ 110.0\ \text{tsp (us)} = 0.119263 \ \text{gal (uk)}$$
Example 4
Convert $130.0\ \text{tsp (us)}$ to $\text{gal (uk)}$.
$$\text{Volume}_{\text{gal (uk)}} = 130.0 \cdot 0.001084211179277137056239537712627775$$
$$\text{Volume}_{\text{gal (uk)}} = 0.140947$$
$$\therefore \ 130.0\ \text{tsp (us)} = 0.140947 \ \text{gal (uk)}$$
Example 5
Convert $200.0\ \text{tsp (us)}$ to $\text{gal (uk)}$.
$$\text{Volume}_{\text{gal (uk)}} = 200.0 \cdot 0.001084211179277137056239537712627775$$
$$\text{Volume}_{\text{gal (uk)}} = 0.216842$$
$$\therefore \ 200.0\ \text{tsp (us)} = 0.216842 \ \text{gal (uk)}$$