Gwendolyn draws a hotdog on graph paper using the scale shown below. The hotdog has a length of 999 units in the drawing.
A hotdog on graph paper. A 9-unit long line is labeled, "length." A 6-unit long scale is labeled, "10 centimeters."
What is the length, in \text{cm}cmstart text, c, m, end text, of the actual hotdog?