How much volume has to be exca- vated from the borrow pit to meet the job requirement?

 A soil sample taken from a borrow pit has a natural void ratio of 1.15. The soil will be used for a highway project where a total of 100,000 m3 of soil is needed in its compacted state; its compacted void ratio is 0.73. How much volume has to be exca- vated from the borrow pit to meet the job requirement?