A crayon has a mass of 30 grams. How many crayons can be made with 30 kilograms of colored wax

The conversion factor between kilo and base unit which is grams in this question is 1000 so there is 1000 grams in 1 kilogram so first we need to convert kilograms to grams so we multiply by 1000 so 30kgx1000 = 30000 grams so to find the number of crayons then we divide by 30 which is the mass of one crayon to find out how many we need so 30000/30 = 1000 so you would need 1000 crayons