For most of us, the calculator on our smartphones is a godsend when figuring out the dinner bill or other computations, but for Shakuntala Devi, her brain was the fastest way to figure out a complicated math problem.

Google is honoring the 84th birthday of the so-called “Human Computer” with an animated homepage doodle that spells out its logo as it might appear on a calculator, next to a smiling, digital portrait of Devi (click below to see it in action).

“A calculated effort today for the #humancomputer #ShakuntalaDevi’s 84th birthday,” Google tweeted today.

Devi was born in Bangalore, India in 1929. After discovering her talent for numbers, Devi’s circus performer father took his daughter on the road, making her skills part of his act. She had no formal education, but demonstrated a masterful command of numbers well into adulthood, challenging man and machine alike, and publishing a number of books on the subject.

Her skills landed her a spot in the Guinness Book of Records, once for multiplying two 13-digit numbers in 28 seconds.

“Nobody challenges me. I challenge myself,” Devi said during a 1996 interview(Opens in a new window) with Inside Story.

Devi died earlier this year(Opens in a new window) in India from a respiratory ailment.

For more of Google’s doodles, see the slideshow below. Recently, the search giant has honored the first parachute jump, the “Queen of Salsa” Celia Cruz, Yosemite National Park, French physicist Léon Foucault, Hull House Founder Jane Addams, Rembrandt van Rijn, and more.

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