To find volume you multiply all three dimensions by one another. We can approximate this by multiplying the smaller ones first.
12*4=48 Now multiply 48 by 10.
48*10=480 We still have 7 to deal with, so we can multiply 48 by 2 and then by 5.
48*5=240
48*2=96
Now add the three together.
480+240+96=816.
Your answer is 816.
