# 396 mm to inches

#### Understand the Problem

The question is asking for the conversion of a measurement from millimeters to inches. To solve it, we will use the conversion factor where 1 inch equals 25.4 millimeters.

$$\text{Inches} \approx 3.94$$

$$\text{Inches} \approx 3.94$$

#### Steps to Solve

1. Identify the conversion factor

To convert from millimeters to inches, we will use the conversion factor:
$$1 \text{ inch} = 25.4 \text{ millimeters}$$

1. Set up the conversion equation

To find the number of inches from a given millimeter value (let's call it $x$ mm), we will explore the relationship using the conversion factor. The formula for conversion will be:
$$\text{inches} = \frac{x \text{ mm}}{25.4 \text{ mm/inch}}$$

1. Perform the calculation

Substitute the value of $x$ (the measurement in millimeters) into our equation to find the measurement in inches.
For example, if $x = 100$ mm, the equation is:
$$\text{inches} = \frac{100 \text{ mm}}{25.4 \text{ mm/inch}}$$

1. Calculate the result

Using a calculator for the division:
$$\text{inches} \approx \frac{100}{25.4} \approx 3.937$$

1. Round or format the answer accordingly

Depending on the requirements, you may need to round your answer to a certain number of decimal places. Here, let’s round to two decimal places. So, the result will be:
$$\text{inches} \approx 3.94$$

$$\text{Inches} \approx 3.94$$

This result shows how you can convert measurements from millimeters to inches using the relationship where 1 inch equals 25.4 millimeters. This conversion is commonly used in various fields such as engineering, carpentry, and everyday measurements.

#### Tips

• Forgetting to use the conversion factor correctly can lead to errors.
• Mixing up which value goes in the numerator and which goes in the denominator.
• Not rounding the final answer as required, leading to imprecise results.
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