A planet has a volume of $\displaystyle {7.1}\cdot{10}^{{15}}$ km³. One of its moons has a volume of $\displaystyle {7}\cdot{10}^{{14}}$ km³. Another moon has a volume of $\displaystyle {9.2}\cdot{10}^{{13}}$ km³.
NASA: Three of Saturn's moons: Tethys, Enceladus and Mimas

Do your best to draw these three numbers on a number line. Either upload a photo of your paper or draw the number line in the box below.

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Which of the following is the best explanation of why it's difficult to draw these three numbers on a number line?