 So let's start off with a concrete version of the multiplication in base n. And so we might take the product 3 times 312 base 4. So again, if you know the definitions, you can do the mathematics. According to the definition of multiplication, 3 times 312 base 4 is the same thing as 3 312 base 4's added together. So we can find this product by doing repeated addition. And so we'll set down our add-ins. So here's a 312, and I'll take a couple more sets like this. We'll bundle. So here's a set of four of these slabs. And there's another set of four. And we can bundle these four blocks together. And then there's this bundle. And record our answer. So remember arithmetic is bookkeeping, and we have three types of units present. This one, this one, and this one. However, there is a unit that we went through that was between the smallest and the next sized unit. And that was the unit we might represent this way. And so arithmetic is bookkeeping, and we want to record how many of each type of unit. And so we look, we have two of these extra large units, two large, zero medium, and two small units. So there's our recorded product with the units explicitly written. We'll drop the unit designations. And then remind ourselves that these are units in base four. And so here's our final answer. Three times 312 base four is equal to 2202 base four.