Long Multiplication Calculator

What is Long Multiplication?

Long multiplication multiplies by each digit of the second number in turn — shifting one place left each time — and adds the partial products together.

How it works

We compute each partial product with its place-value shift, print them in a column layout, and sum them for the final product.

1. Enter your input. Type or paste your input into the field above — the tool responds instantly.
2. Review the result. Output updates live as you type. Everything runs entirely in your browser.
3. Copy or download. Use the Copy button to grab the result, or Download to save it as a file.

Examples

Realistic sample

Type or paste any realistic input — the tool computes the result locally and instantly.

Common mistakes

Expecting a server round-trip

Nothing is uploaded — every tool in this category runs entirely in your browser.