The Human Calculator from India

Shakuntla Devi was given this title after she demonstrated the calculation of two 13 digit numbers: 7,686,369,774,870 × 2,465,099,745,779 which were picked at random. She answered correctly within 28 seconds.

Shakuntala Devi (4 November 1929 – 21 April 2013) was an Indian writer and mental calculator, popularly known as the "Human-Computer". Shakuntala Devi strove to simplify mathematics for students. Her talent earned her a place in the 1982 edition of The Guinness Book of World Records. Devi was a precocious child and she demonstrated her arithmetic abilities at the University of Mysore without any formal education.

A film on her life story was announced in May 2019, slated to be released in summer 2020. The eponymous film stars Vidya Balan in the lead role and features Sanya Malhotra, Amit Sadh, and Jisshu Sengupta. It is produced by Sony Pictures Networks Productions and Vikram Malhotra. The release date of the film was initially planned for 8 May 2020, however, due to the COVID-19 pandemic, the film will be streamed worldwide on Amazon Prime Video on 31 July 2020, instead of a theatrical release.