 Okay, for this first problem, we're just doing volume to volume conversion. So in order to do one of these types of problems, you're going to need these three conversion factors up here. One liter is 1.057 quarts. One liter is 1,000 mils. This is a metric to metric conversion. You should be learning those, putting them to memory. This one's a good one to know too, 1 mil equals 1 cubic centimeter. It allows you to convert between mils and cubic centimeters quite readily. So the problem gives you this number in units for the volume in quarts is 5.0 quarts and you're to convert that to centimeters cubed. So what you're going to want to do is take what's given to you in the problem first and then use each successive conversion factor to cancel out the units that you don't want. Okay, so first we're going to have this 5.0 quarts, but we don't want quarts, so we want to cancel it out. So since it's in the numerator, we want to put quarts in the denominator here. And that goes alongside its little number there, 1.07. So 1.057 quarts in the denominator, one liter in the numerator, but we don't want liters either, and that's what we would have now, we want to cancel those out. So how do we do that? We got to put liters in the denominator, one liter, and 1,000 mils in the numerator. That's the next conversion factor that we're using. So but we don't want mills either, but we know how to cancel that out. So we use the last conversion factor, put milliliters in the bottom, cancel those out and we get cubic centimeters. So the answer comes out to 5.0 times 10 to the third cubic centimeters. Your calculator gives you 4,000, something or other, what is it, yeah, 4,730. You need to take that to two significant figures. Why? The problem, the number that is given in the problem is two significant figures. So you always got to remember, go back to what the number in the problem has and put that same number of significant figures here. So 5.0 times 10 cubed centimeters cubed. Okay, hopefully that makes sense. Let me know if there are any issues.