i think 16 gallons
Either your headlight is burned out or you have a broken wire. You can check it out with a volt meter.
The density of Mercury is 13,593 kg/m3 (kilograms per cubic meter). That is equivalent to 113.4 lb/gal [US].(pounds per gallon). 420/113.4lbs is ~3.7 gallons
1 cubic meter is 264.172 US gallons.
There are 264.2 US gallons in one cubic meter.
1 cubic meter = 264.172052 US gallons.
Approx 110 gallons.
One cubic meter is 264.172 US gallons.
1 cubic meter is 264.172052357 US gallons.
There are 219.969 UK gallons per cubic meter.
1 cubic meter = 219.969 Imperial liquid gallons
1 cubic meter = 219.969 Imperial liquid gallons
One cubic meter contains 264.2 US gallons of water OR 220 UK gallons of water.