2. In the expression $1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9=100$, replace the asterisks with arithmetic operation signs to obtain a correct equation.
Solution. $1+2+3+4+5+6+7+8 \cdot 9=100$.

Evaluation. 12 points for the correct solution.