70,000 for 6 years at a simple interest rate of 10,5% find the interest paid on the loan an total paid

A $70,000 loan at 10.5% for six years will accrue interest as follows:  

i = $70,000(0.105)(6) = $44,100.

Paying off this loan plus the accrued interest will require $70,000 + $44,100, or $114,000.

what level of math? also i don't need to be paid if i can you.