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Calculate the number 1644

NUMBERMANIA: Calculate the number 1644 using numbers [5, 5, 8, 8, 34, 281] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 13

The first user who solved this task is Nílton Corrêa de Sousa.

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Tony Roberts: Old Grandmother

My grandmother is older than the word supper.

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Fritz von Opel

Died 8 Apr 1971 at age 71 (born 4 May 1899).German automotive industrialist who took part, with Max Valier and Friedrich Wilhelm Sander, in experiments with rocket propulsion for automobiles and aircraft. On 11 Apr 1928, at Berlin, they tested the first manned rocket automobile. On 30 Sep 1929, von Opel piloted the Opel Sander Rak.1, a glider powered with 16 rockets of 50 pounds of thrust each, and made successful flight of 75 seconds, covering almost 2 miles near Frankfurt-am-Main, Germany, Von Opel as pilot. By sponsoring these early tests of rocket-powered transport, Opel popularized the idea of rocket propulsion in Germany.

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