Assume that the loan term of 80w and 70w is 5 years and the annual interest rate is 1%.

Interest on 1 and 80w =80*5* 1%.

=4w

2.70w interest =70*5* 1%

=3.5w

Interest = principal x time x interest rate.

The interest-bearing time is the same, and the less the principal, the less the interest.