What is 3 fouths of 840?

Assigning a small number of tasks to each worker? What numbers can multiply to one and add to 3? Is there a number that has a googolplex zeros? What number times half equals 4? What speed does the average person run? How many square millimeters are there in 7 feet 11 inch? What is a angle that measure 60 degrees? How much is 10 inches plus 5 feet and 4 inches? Divide 30 by 0.6214? How many mouse traps are sold per year? Does density of wood change with size? How can you get 24 by using only the numbers 8 3 3 4? Which is the slope of a line with the coordinates 1 and 4 and 3 and 1? What is the GCF of 150 and 525? Why a cube is a cuboid? How many years till the next millenuim? How many km are in 4.5 cm? How do you do proportions with more than one variable? How much times does 14 go into 50? How many sq kilometers in 1 meter?