The result of your conversion between Dram and gallon [US, dry] appears here
To convert between Dram and Gallon [US, Dry] you have to do the following:
First divide ((0.000016387064*231)/128)/8 / 0.0044048838 = 0.00083923
Then multiply the amount of Dram you want to convert to Gallon [US, Dry], use the chart below to guide you.
Symbol: dr
No description
Symbol: gal
No description