Error when multiplying two vectors

Hello! I have two vectors of data that I need to multiply with each other and then podoleit

B = zeros(1,2);
IWant = [a B];
Want=IWant*lett+20/lett+1;
% 'a' dimensions 1x1101
% IWant 1x1103
% lett 1x1103
Error using  * 
Inner matrix dimensions must agree.

Answer 1

[Andrei Bobrov]

Use .* and ./:

Want=IWant.*lett+20./lett+1;