1. The problem is to evaluate the expression $100 \times i$ where $i$ is the imaginary unit defined by $i^2 = -1$. 2. Multiplying a real number by $i$ results in a purely imaginary number. 3. Therefore, $100 \times i = 100i$. 4. The final answer is $100i$ which is a complex number with zero real part and imaginary part 100.