Since 1 US Dollar is equal to 4.027238 Polish Zloty, we could say that n United States Dollars are equal to 4.027238 times n Polish Zloty. In other words, we could use the following formula:
Polish Zloty = United States Dollars x 4.027238
For example, let's say that we want to convert 2.0 United States Dollars to Polish Zloty. Then, we just replace United States Dollars in the abovementioned formula with 2.0:
Polish Zloty = 2.0 x 4.027238
That is, 2.0 United States Dollars are equal to 8.054476 Polish Zloty.