BRAIN TEASERS

# Calculate the number 1238

NUMBERMANIA: Calculate the number 1238 using numbers [4, 6, 6, 9, 80, 927] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #numbermania

### On the first day of school...

On the first day of school, Peter handed his new teacher a note from his mother. The teacher unsealed the note, read it, looked at Peter with a frown, and placed the note inside a desk drawer. “So what did she write?” Peter asked. “It’s a disclaimer.”
“A what?” “It says, ‘ The opinions expressed by Peter are not necessarily those of his mother or father,’”
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### Louis-Paul Cailletet

Born 21 Sep 1832; died 5 Jan 1913 at age 80.French physicist and iron master noted for his work on liquefaction of gases. Working at his father's metallurgy business, he investigated the permeability of iron to hydrogen and other gases, accounting for the unpredictable behaviour of some irons in terms of an excess of dissolved gases. In 1870, he began carefully measuring whether real gases deviate from "ideal" gas law behaviour. From this grew an interest in the liquefaction of gases. He used the Joule-Thomson effect - compressing a gas whilst cooling it, then allowing its rapid expansion to cool it still further - and in 1877-78, was first to produce droplets of liquid oxygen, hydrogen, nitrogen, carbon monoxide, nitrogen dioxide and acetylene. He also invented the altimeter and the high-pressure manometer.Image: Cailletet's liquefier.
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