Wait are you going to send a picture to fully show us what the question is about
Multiply them together. The product is the answer of a multiplication process.
3: terms/ 12, 8r, -3, s, -5, 15t coefficients/ 8r, 1s, 15t
.15% translates to
.0015, and "of" means to multiply. so .0015 multiplied with 43 is
.0645