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Calculate the number 399

NUMBERMANIA: Calculate the number 399 using numbers [4, 2, 7, 4, 22, 670] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

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HAPPY FATHERS DAY

HAPPY FATHERS DAY - I love my dad

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First U.S. commercial helicopter license

In 1946, the New York Journal-American newspaper was issued License No. 1 for its helicopter by the Cicil Aeronautics Administration. The helicopter was used for news gathering and delivering photographs. It was a Bell 47B, which had a cruising speed up to 100 m.p.h.«

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