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Calculate the number 3462

NUMBERMANIA: Calculate the number 3462 using numbers [9, 4, 8, 5, 58, 668] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 7

The first user who solved this task is Nasrin 24 T.

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Air brake

In 1869, the first U.S. patent for an air brake was issued to George Westinghouse of Schnectady, N.Y., entitled “Improvement in steam-power-brake devices” (No. 88,929). It was used on an experimental train carrying officials of the Panhandle Railroad. Although it demonstrated its value, it was not entirely successful because it took longer for the air to reach the last cars of the train, so each car stopped at a different time. This was corrected with his “triple air brake” patent issued 5 Mar 1872 (No. 124,405). Fifteen years later, he invented an automatic brake.

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