If it requires x⁴ silkworms to produce enough silk to make a scarf in a given amount of time, but it requires x¹⁹ silkworms to produce enough silk to make a sheet in the same amount of time. How many times more silkworms are needed for the sheet than the scarf? Hint: Divide number of silkworms to make a sheet by the number of silkworms to make a scarf.