Since 1 US Dollar is equal to 55.978497 Philippine Pesos, we could say that n United States Dollars are equal to 55.978497 times n Philippine Pesos. In other words, we could use the following formula:
Philippine Pesos = United States Dollars x 55.978497
For example, let's say that we want to convert 2.0 United States Dollars to Philippine Pesos. Then, we just replace United States Dollars in the abovementioned formula with 2.0:
Philippine Pesos = 2.0 x 55.978497
That is, 2.0 United States Dollars are equal to 111.956994 Philippine Pesos.