I want to know how to calculate the PV (Present value) of interest payment for a bond using the excel method, please giving the following example to help:

FV of bond = 10,000,000

Total no. of periods = 40

Coupon interest rate per period = 3.8%

Market interest rate per priod = 4.2%

The present value of prinicpal is easy = PV ( rate 0.042, Nper 40, pmt 0, fv 10,000,000)

Can you help me with the equation using excel for present value for interest payment?