Convert UK gill to US beer barrel
Unit definitions
UK gill
$5$ UK fluid ounces are equal to $1$ UK gill.
US beer barrel
The US beer barrel is defined as exactly $31$ US liquid gallons.
How to convert UK gill to US beer barrel
$$\text{Volume}_{\text{bbl (beer)}} = \text{Volume}_{\text{gi}} \cdot 0.001210635005549248921042751244584877$$
Examples
Example 1
Convert $35.0\ \text{gi}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 35.0 \cdot 0.001210635005549248921042751244584877$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.042372$$
$$\therefore \ 35.0\ \text{gi} = 0.042372 \ \text{bbl (beer)}$$
Example 2
Convert $80.0\ \text{gi}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 80.0 \cdot 0.001210635005549248921042751244584877$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.096851$$
$$\therefore \ 80.0\ \text{gi} = 0.096851 \ \text{bbl (beer)}$$
Example 3
Convert $115.0\ \text{gi}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 115.0 \cdot 0.001210635005549248921042751244584877$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.139223$$
$$\therefore \ 115.0\ \text{gi} = 0.139223 \ \text{bbl (beer)}$$
Example 4
Convert $135.0\ \text{gi}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 135.0 \cdot 0.001210635005549248921042751244584877$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.163436$$
$$\therefore \ 135.0\ \text{gi} = 0.163436 \ \text{bbl (beer)}$$
Example 5
Convert $170.0\ \text{gi}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 170.0 \cdot 0.001210635005549248921042751244584877$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.205808$$
$$\therefore \ 170.0\ \text{gi} = 0.205808 \ \text{bbl (beer)}$$