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Google has something big to celebrate for Pi Day this year: one of its teams has broken the Guinness World Record for the most accurate value of pi. Emma Haruka Iwao and her colleagues used the power of cloud computing to calculate for 31,415,926,535,897 digits of pi. That's 9 trillion digits more than the previous record and a whole novel longer than the 3.14 value most of us know. To accomplish that task, Iwao had to run a pi-benchmark application called y-cruncher on 25 Google Cloud virtual machines for 121 days.