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($7$) The product of two numbers is the greatest $2$-digit number. If one of the numbers is $-11$, find the other number. On dividing $-8016$ by $x$, the answer obtained is $-16$. Find the value of integer $x$. Evaluate the following. ($9$) $49 \times 89 \times (-107) \times 0 \times 412$ ($1$). $(-8) \times (-16)$ ($8$). $[12+9] \div [-9 \div 3]$ $\sqrt{([9+6-12-3] \div (-48))}$