How do you verify your calculations before submitting assignments or projects?

I've noticed that many mistakes in mathematics and engineering assignments come from small calculation errors rather than misunderstanding the main concept.

When working on equations, formulas, or longer calculations, what method do you use to verify your results before submitting your work?

Some common approaches I've seen are:

• Recalculating the problem from the beginning

• Checking each intermediate step

• Using software tools for verification

• Comparing results with classmates or instructors

Personally, I try to solve problems manually first and then verify the final result using calculation tools. For basic verification and checking intermediate steps, I've occasionally used Calculadora Alicia alongside other educational resources.

I'm interested in learning which methods students and educators find most effective for improving accuracy and reducing avoidable mistakes.

What works best for you?