IMAS 2017 — Middle Primary Grades 3–4 — Round 1 Question 13

Define a new operation “*” such that $ 4 * 2 = 86 $, $ 6 * 3 = 189 $, $ 8 * 4 = 3212 $ and $ 9 * 3 = 2712 $. Find $ 10 * 2 $.