The result of your conversion between pony and gallon [US, dry] appears here
To convert between Pony and Gallon [US, Dry] you have to do the following:
First divide (0.000016387064*231)/128 / 0.0044048838 = 0.0067138
Then multiply the amount of Pony you want to convert to Gallon [US, Dry], use the chart below to guide you.
Symbol: pony
No description
Symbol: gal
No description