Multiplication is indicated between a number and a variable by writing them next to each other. A "product" is the result of multiplication, so "the product of 167 and b" is written 167b.
If you want a value that is 84 more than that, you get it by adding 84.
You need two pieces and 1 has to be 2x longer than the other set x as the smaller piece (easier to always go with the smaller value as x) the other piece is 2x (double in size) your equations would be 3x=240>>> x= 60