The purpose of this Number Talk is for students to mentally calculate a product, with which students will work in context in this lesson. The first two products students may know from memory but if not, the idea of doubling $8 \times 4$ to find $8 \times 8$ can be helpful both for finding the value of $8 \times 8$ and for starting a pattern that continues with the next product, $8 \times 8 \times 2$, which is double $8 \times 8$. The factors 8, 8, and 20 turn out to be the side lengths, in feet, of a standard container used on cargo ships. Students will examine these containers and the ships that carry them throughout the lesson.