Thermodynamics internal energy Problem

[liamtcarroll]

Six grams of water changes from liquid to
vapor at a pressure of one atmosphere. In the
process, the volume changes from 0.9 cm^3
to2387 cm^3. The latent heat of vaporization of
water is 2.26 × 10^6 J/kg

Find the increase in internal energy of the
water.
Answer in units of J

When i did this i did Q=mL. I got 13500J to be my answer and the program I'm using said it was wrong

 

[liamtcarroll]

I answered it myself i had to subtract my work from my answer