Assume that previous fast food research has shown that 80 percent of the consumers like curly french

Question:

Assume that previous fast food research has shown that 80 percent of the consumers like curly french fries. The researcher wishes to have an error of 6 percent or less and be 95 percent confident of an estimate to be made about curly french fry consumption from a survey. What sample size should be used for a simple random sample?