Please help me I do not understand. A cube has a side length of 3x to the 6th power units. A smaller cube has a side length of an units. How many smaller cubes will fit in the larger cube. Express in simplified form.

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)