Task: Question Answering
Input (English): Problem: the sum of the first n positive perfect squares , where n is a positive integer , is given by the formula n ^ 3 / 3 + c * n ^ 2 + n / 6 , where c is a constant . what is the sum of the first 20 positive perfect squares ? 
Options: a ) 1,010 , b ) 1,164 , c ) 1,240 , d ) 2,316 , e ) 2,870
Output (English): e