Use 9 unit multiples to convert 10,000 cubic centimeters to cubic miles

2.54 centimeter = 1 inch

(2.54) ^3 = 1 cubic inch

16.387064 cc = 1 cubic inch

10,000 cc = how many cubic inches?

10,000 cc * 1 cubic inch / 16.387064 cc =

610.237 cubic inches

How many inches in 1 mile?

5,280 feet / mile * 12 inches / 1 foot = 63,360 inches in a mile

(63,360) ^3 = 254,358,061,056,000

Therefore, there are 2.54358 * 10^14 cubic inches in a cubic mile

(1 cubic mile / 2.54358 * 10^14 cubic inches) * 610.237 cubic inches =

2.39913 x 10^-12 cubic miles

I probably didn't use 9 unit multiples (because I don't know what that means), but the answer is correct.