An image of a mitochondrion within a yeast cell is shown under a transmission electron microscope. The image of the mitochondrion is magnified 18,000 times and has a measured image length of 4.5 cm.

Calculate the real length of the mitochondrion. Give your answer in micrometres (μm\mu\text{m}μm).
Use the equation:
real length of mitochondrion=length of image of mitochondrionmagnification\text{real length of mitochondrion} = \frac{\text{length of image of mitochondrion}}{\text{magnification}}real length of mitochondrion=magnificationlength of image of mitochondrion
Given that 1 cm=10 mm1\text{ cm} = 10\text{ mm}1 cm=10 mm and 1 mm=1000 μm1\text{ mm} = 1000\ \mu\text{m}1 mm=1000 μm.