Can someone please help me to solve it. I do not the how this correct answer came.

Alesha is wondering what she will be owing on her mortgage at the end of the five year term. She has a $354,000 mortgage with a semi-annual interest rate of 5.1%, amortized over 25 years. If she continues paying the same payment based on the 25 year amortization, what will she owe at the end of the five year term?

Correct Answer: 313,807 5