If ya mean 1 + 8 + 1 + 8 + 1 + 8, then da answer be 27.
If ya mean 18 + 18 + 18, then da answer be 54.
Lastly, if ya mean (1)(8) + (1)(8) + (1)(8), then da answer be 24.
So, depending on what ya mean in dis question, da answers can be, 27, 54, or 24.
