A pie was a unit of currency

Currency

In economics, currency refers to a generally accepted medium of exchange. These are usually the coins and banknotes of a particular government, which comprise the physical aspects of a nation's money supply...

 in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 that is no longer in use. It was the smallest currency unit, equal to 1/3 paisa

Paisa

The paisa is a monetary unit in several countries. Linguistic variants of paisa include poisha and baisa . In India, Nepal and Pakistan, the paisa currently equals of a rupee. In Bangladesh, the poisha equals of a Bangladeshi taka...

, 1/12 anna or 1/192 rupee

Rupee

The rupee is the common name for the monetary unit of account in India, Sri Lanka, Nepal, Pakistan, Mauritius, Seychelles, Maldives, and formerly in Burma, and Afghanistan. Historically, the first currency called "rupee" was introduced in the 16th century...

. It was minted in the unique toroidal

Torus

In geometry, a torus is a surface of revolution generated by revolving a circle in three dimensional space about an axis coplanar with the circle...

 form of a circle with a hole. It was abolished in the decimalisation

Decimalisation

Decimal currency is the term used to describe any currency that is based on one basic unit of currency and a sub-unit which is a power of 10, most commonly 100....

of Indian currency and also due to practically zero value due to inflation. It is used till the middle of the 20th century.