High gas prices are Biden's fault says GOP...

It depends; are you talking about the Queen's real gallons, or American gallons?

1L –> 0.22 gallons –> 4.55 litres is 1 gallon
1L –> 0.26 US gallons –> 3.79 litres is 1 US gallon is 0.83 gallon

$1 CDN -> $0.78 USD
£1 -> $1.30 USD

So, in USD and US gallons, the prices in the picture are:
$5 a US gallon (the easy one)
$5.43 a US gallon
$8.20 a US gallon

Put simply a U.S. Gallon is 4 quarts , an Imperial Gallon is 5 quarts . My first trip to Canada in a new car that messed up my mileage figuring.

For an American coming to Canada, spending American dollars on Canadian gas:

$2.96 a US gallon after the monetary conversion, and not taking into accounts any fees.

Note that gas prices in Europe, have always been higher in general. One reason diesels so popular there.

Canada and most US trading partners have been negatively affected as US policies drive up worldwided price of oil per barrel.

Let's start that again.

1L is 3.79 US gallons.
So, to buy one US gallon, in each respective country:
$5 USD is USA
$7.92 CDN in Canada
£6.29 GBP in the UK

5 USD is 5 USD
7.92 CDN is 6.22 USD
6.29 GBP is 8.20 USD

OK start again - 1L = 0.264172 U.S. Gallons

By your math, that 2 liter of soda in your fridge would equal 7.58 gallons - it wouldn't fit in your fridge.

OP was right - one liter is about one U.S. quart.

Want to easily compute what the price of gas equivalent is when advertised in Liters? Multiply by four.

Imagine Canada and UK's surprise - according to the GOP - that Biden's responsible for their high fuel costs as well, rather than legitimately assigning it to the war currently brewing between Russia and Ukraine.

Apparently, it started rising as soon as SCOTUS declined to hear the Texas suit.

For the same reason why prices dramatically dropped during lockdowns; supply and demand. They began to rise again as soon as lockdowns eased up with more and more people getting back into their cars, while production hasn't kept up with demand.