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Calculate the number 2641

NUMBERMANIA: Calculate the number 2641 using numbers [8, 7, 2, 3, 95, 399] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 25

The first user who solved this task is Thinh Ddh.

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Otto von Abich

Died 1 Jul 1886 at age 79 (born 11 Dec 1806).Otto Wilhelm Hermann von Abich was a German geologist whose early work was on spinels and other minerals. Later, he made special studies of fumaroles, of the mineral deposits around volcanic vents, and of the structure of volcanoes. He was a supporter of volcanistic theory, and was noted for his explorations in Asia. After moving to Russia in 1843, until his retirement, he made studies that ranged among minerology, petrography, paleontological stratigraphy, tectonics, and economic geology. He developed the anticlinal theory of oil prospecting. The mineral now called clinoclasite (basic copper arsenate) was originally named Abichite after him.

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