If you consider a cube or a rectangular prism, you could identify it's volume through the multiplication of it's Base by height. A pyramid has 1 / 3rd that volume, so in order to take a volume of the figure to the left, we would multiply Base * height and take 1 / 3rd of that;
Neither one is correct. 512/53 equals 9 35/53. The reason that I know this is because 53 goes into 512 9 times and your left with 35 and you just put the 35 over 53.