We are given the equation $\boxed{?} \div 10 = 2.2$ and we need to find the missing number.

1. Problem Description

We are given the equation $\boxed{?} \div 10 = 2.2$ and we need to find the missing number.

2. Solution Steps

Let $x$ be the missing number. The equation can be written as:

$x \div 10 = 2.2$

To find $x$, we multiply both sides of the equation by 10:

$x \div 10 \times 10 = 2.2 \times 10$

$x = 22$

3. Final Answer

The missing number is 22.