 Okay, in this problem what we're doing is converting density from pounds per cubic inch to grams per cubic centimeter. So we're going to need the two conversion factors that I've written up on the top. One inch equals 2.54 centimeters and one pound equals 453.59 grams. And remember the density formula is mass divided by volume. So you put the mass on top that was given to you in the problem and the volume on bottom which we've done. And we don't want pounds or cubic inches so we're going to have to convert those. So we use the grams to pounds conversion first to cancel out pounds but pounds are the bottom grams at the top. And then we have inches cubed and we want to go to centimeters cubed but the conversion factor only shows us inch to centimeter. So what we have to do is come cube both the units and the numbers. So when we do that we'll cancel everything out and then get the units that we want of grams per cubic centimeters. And then when we plug that into our calculator we get 10.6 with a lot of numbers afterwards. And what we have to remember is the significant figure rule. So the number of significant figures has to be the same number that would have been given to you using the values from the problem. So in both of these values that are given to us that three significant figures and we're only doing multiplication and division and the problem so the answer also has three significant figures. So the answer is 10.6 grams per cubic centimeter. Hopefully this will be helpful.