 Okay, so in this problem, we're converting our volume of water to the mass of water and you're going to need a set of several conversion factors. So that's quite a few. One yard equals three feet, one foot equals 12 inches, one inch equals 2.54 centimeters, one centimeter cubed equals one mil, one mil equals one gram, one gram, or one kilogram equals a thousand grams, and one kilogram equals 2.205 pounds. So this problem kind of forces you to not expand out your cube conversion factors to cancel them because you don't have much room on your page to do all of those cancellations. So remember, you can do it the shortcut way by putting parentheses around the whole conversion factor and putting the cube. But also remember, when you do that, you have to cube that number too. So like in the first conversion factor, you've got a three feet. You've got to remember to cube three to get 27, okay? So if you don't do that, you don't cube 12, you don't cube 2.54, you're going to get some weird number. But anyway, so you should be past that by now because we've been doing several of these problems where we showed us how to expand it and then to contract it and just do the cube. So by this time, hopefully you can do that. So anyways, we're going to cancel out yards cubed by putting yards in the bottom and then we have feet cubed and we're going to cancel that out by putting feet in the bottom centimeters up top. Now we have centimeters cubed. Now our life's a little bit easier because we're going from cubed units to non-cubed units. So cancel out our centimeters cubed with the centimeters cubed equals one mil conversion factor and then using the density of water, one gram is one mil. So we can cancel that out. And then of course, we want to get rid of grams so we can use our kilograms to cancel that out. So one kilogram equals a thousand grams with that gram unit on the bottom. And lastly, we know the conversion factor to pounds. So pounds up top, kilograms on the bottom, cancels out. So multiply all that by 2.205 pounds. And you're going to get some number 1685.8 or something like that. You got around that to two sig figs. Okay, why? Because your number given in the problem, of course, had two sig figs. So 1.7 times 10 cubed pounds or you can say 1700 pounds 1700 no dot after the last zero. Okay, let me know if there are any questions on this one. Pretty good problem.