Multiply two numbers with the lattice (grid) method, showing every cell and the diagonal sums. Enter your values; the result updates as you type, with the method shown below.
Formula
Sum the diagonals of digit products
Worked example
347 × 26 = 9,022.
Frequently asked questions
How does the lattice method work?
Each cell holds a digit product split into tens and units; diagonals are then added.
Why learn it?
It separates multiplying from carrying.
Is it the same result?
Yes, the same as long multiplication.
Related calculators
Results are estimates for information only. Check important figures with a professional.