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Calculate the number 983

NUMBERMANIA: Calculate the number 983 using numbers [4, 4, 9, 9, 73, 910] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 0

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Jan Ingenhousz

Born 8 Dec 1730; died 7 Sep 1799 at age 68. Dutch-English physician who discovered photosynthesis by identifying that sunlight gave green plants the ability to take in carbon dioxide, fix the carbon, and purified the air (returned oxygen) to the benefit of respiration of animals. Earlier, as a physician, he promoted Edward Jenner's use of inoculation with live smallpox vaccine to induce protection against the disease. Ingenhousz was a diligent experimenter, who studied soils and plant nutrition. He introduced the use of cover slips on microscope slides. He improved phosphorus matches and an apparatus for generating static electricity; investigated Brownian motion and heat conduction in metals, invented a hydrogen-fueled lighter, and mixed an explosive propellant for firing pistols.«

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