 Okay, so let's go back to the original question. How much would it cost me to buy my truck full of chocolate? Well, if I had a chocolate bar that was four meters long, so it looked exactly like a chocolate bar It was just scaled up to be four meters long. We've already worked out. That's about 40 times as big in one length And so if I scaled up my chocolate bar by a factor of 40 in length Then the total volume and therefore the total mass of chocolate will go up as 40 cubed Which is 64,000 times as much chocolate and presumably would cost about 64,000 times as much Although I would be hoping for a bulk discount by that point Now in fact, it's even worse than that because my chocolate truck isn't quite the same shape as a block of chocolate If I had a block of chocolate that was 40 meters long, it might actually look about as wide as a truck So in other words if I look from the truck above that shape looks roughly like a chocolate bar But if we were to look from the side the chocolate bar would look a lot thinner than the truck In other words the shape of a truck looks a lot more like several chocolate bars on top of each other And if I just look at my drawing here, I might have a chocolate bar chocolate bar a chocolate bar I have three or four of these so in fact my first guess is I'm going to need about say three times 64,000 times as much chocolate. So that's about 192,000 times as much. No, I haven't been very accurate. So I'm not going to use these significant figures. So I'll just say it's 2 by 10 to the 5 times as much chocolate or 200,000 times as much chocolate When you're making guesstimates, you got to be very wary of carrying Tiffany's significant figures because we were making stuff up left right and center there So really the only number that we can be reasonably comfortable with is this one Even that too is suspect because we're making big guesses But it does tell me that I'm going to need something like a few hundred thousand times the price of a single block of chocolate In order to buy my chocolate truck, which I must admit is a little bit disappointing But at least I have some concrete aims for when I finally become a multimillionaire