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Calculate the number 258

NUMBERMANIA: Calculate the number 258 using numbers [5, 5, 2, 2, 80, 560] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 7

The first user who solved this task is Djordje Timotijevic.

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Math Teacher

Math Teacher: "If I have 5 bottles in one hand and 6 in the other hand, what do I have?"
Student: "A drinking problem."

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Giovanni Battista Donati

Born 16 Dec 1826; died 20 Sep 1873 at age 46.Italian astronomer who, on 5 Aug 1864, was first to observe the spectrum of a comet (Tempel 1864 II), showing not merely reflected sunlight but also spectral lines from luminous gas forming the comet tail when near the Sun. Earlier, he discovered the comet known as Donati's Comet at Florence, on 2 Jun 1858. When the comet was nearest the earth, its triple tail had an apparent length of 50°, more than half the distance from the horizon to the zenith and corresponding to the enormous linear figure of more than 72 million km (about 45 million mi). With an orbital period estimated at more than 2000 years, it will not return until about the year 4000.«

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