To solve this problem, I need to apply the order of operations: parentheses, exponents, multiplication and division, and addition and subtraction. Inside the parentheses, I have to do the multiplication first, from left to right. So, $2 \cdot 3 \cdot 4 \cdot 5$ is the same as $6 \cdot 4 \cdot 5$, which is $24 \cdot 5$, which is $120$. That means the expression inside the parentheses is $1 + 120$, which is $121$. So the problem is now $121 \div 11$. I can do this division by long division, or by noticing that $11 \cdot 11 = 121$. So, $121 \div 11 = 11$. That's the final answer. 
What is $(1 + 2 \cdot 3 \cdot 4 \cdot 5) \div 11$?