3x3x3x3
This is just 3 to the 3rd power, or \(3^3\), which is also known as 27.
This is just 3 to the 4th power, or \(3^4\), which is also known as 81.
Whoops! I meant 3^4 power, which is 81.
actually... it's 3^4... which btw is 81
31 x 31 x 31 x 31 = 3(1+1+1+1)= 34