 So in this example we're going to divide say 2.0 kilograms mass divided by 3.62 cubic meters. This number here, the 2, has two significant figures whereas this has three significant figures. So we need to round the final answer to two significant figures which gives us, if we did it without rounding it would be 0.55248 and that would be kilograms per cubic meter. But of course we can't have that many significant figures if we only knew the first one to two significant figures. So what we're going to do is cross out those extra three there and our final answer is 0.55 and our final example, we're going to multiply two things together. So let's have 33 meters multiplied by 0.002 meters to find the area of some object and if we did that without doing any appropriate rounding it would be 0.066 square meters. But of course this 0.002 only has one significant figure whereas the 33 has two. So we need to round our final answer to 0.07. And so by doing that rounding we make sure that our final answer is not too precise or inappropriately rounded given the original quantities that we needed to do that calculation.