The result of your conversion between ping and cawney appears here
To convert between Ping and Cawney you have to do the following:
First divide 3.305 / (4/3) * (0.09290304*43560) = 0.00061251
Then multiply the amount of Ping you want to convert to Cawney, use the chart below to guide you.
Symbol: ping
No description
Symbol: cawney
No description