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Long Multiplication Calculator
Multiply two numbers with partial products shown.
Enter values to see your result
Frequently asked questions
Why long multiplication?
Teaches place value and distribution. Also the building block for mental arithmetic.
Lattice vs long?
Same result, different visualization. Lattice is a grid; long is a column. Both use partial products.
Russian peasant?
Alternative algorithm using halving and doubling. Demonstrates binary representation connection.