Multiple inputs using dialog box then inputs are placed into equation to get an output?

I am trying to use the input dialog box to calcuate an equation. I know how to use the single input function and creating a function file that would accept multiple inputs but I don't want to use either of those.

% Ask user to input force, height and length of weld.
dlgtitle = 'Inputs';
prompt = {'Force (lbf)', 'Weld Height (in)', 'Weld Length (in)'};
dims = [1, 35];
[P_bw, h_bw, L_bw] = inputdlg(prompt, dlgtitle, dims);
sigma_bw = P_bw / (h_bw * L_bw);

Answer 1

[Walter Roberson]

sigma_bw = str2double(P_bw) ./ (str2double(h_bw) .* str2double(L_bw));

[Zachary Dunagan]

Never mind it converts from string to double value.