The Young's modulus for a material is 15.0 x 10^10 N/m2. The material is stretched to a strain of 6.0 x 10^-3. How much elastic energy will be expended? (Express your answer in J/m3)

The Young's modulus for a material is 11.0 x 1010 N/m2. The material is stretched to a strain of 3.0 x 10-3. How much elastic energy will be expended?

answer is 495000.0