Radius r = 7 cm, height h = 10 cm, and pi = 22/7.

Since the formula is $2 imes \frac{22}{7} imes r imes h$, and $r=7$, the 7s cancel out immediately. The calculation simplifies to $2 imes 22 imes 10 = 44 imes 10 = 440$.

Confusing the curved surface area (lateral area) with the total surface area, which would require adding the two circular bases ($2\pi r^2$).

Always remember that for cylinders, the curved surface area is essentially the perimeter of the base ($2\pi r$) multiplied by the height ($h$), similar to how prism surface areas are calculated.