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Fill in the numbers in each empty box, so that product of each 3 adjacent digits is always 30

Fill in the numbers in each empty box, so that product of each 3 adjacent digits is always 30. Write solution as one multi-digit number.

Correct answers: 64

The first user who solved this task is Djordje Timotijevic.

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Frank Alvord Perret

Died 12 Jan 1943 at age 75 (born 2 Aug 1867).American engineer and inventor who later became apioneerfield volcanologist. Using his prior experience at Thomas Edison's labs, at age 20, Perret co-founded the Elektron Mfg Co. in Brooklyn, NY developing the motors, dynamos and electric controls that the company manufactured (and later, elevators). The first American electric elevator (1887) was probably powered by an Elektron motor. He began a second career in 1904 as a volcanologist, using his electrical knowledge to the measure their seismic activity. He became well known for his studies at Vesuvius (1906), Etna (1910), Stromboli and Kilauea (1911). From 1929, he lived at the foot of Mont Pelée, Martinique, where he founded a memorial volcanological museum.«

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