I need help with this discrete mathematical structures problem.
7. Find the sum and product of each of these pairs of numbers. Express your answers as a base 3 expansion. Hint: We can just add and multiply using the grade-school algorithms (working column by column starting at the right), using the addition and multiplication tables in base three. For example, 2+1=10 and 22=11. When a digit-by-digit answer is too large to fit (i.e., greater than 2), we "carry into the next column. (10 points)
(112)3, (210)3