Multiplying 2 x 2 is easy. But multiplying two numbers with more than a billion digits each — that takes some serious computation. The multiplication technique taught in grade school may be ...

Computationally, multiplying two digits is much more costly than is adding two digits. Suppose then that multiplying two real numbers costs $1 and adding them costs a penny.

To multiply two numbers by hand take a few steps but it’s something we’re taught in school. When dealing with big numbers, really big numbers, we need to a quicker way to do things.

Mathematicians have reportedly discovered a new way of multiplying two numbers together. The new technique is for really large numbers, and if it passes a peer-review, could be the fastest ...

We'll explore how this shortcut works for both two-digit numbers multiplied by themselves, and even for multiplying two different numbers ending in 5.

Multiplying three 1-digit numbers The process of multiplying three numbers together is similar to the process of multiplying two numbers, but it has one extra step.

Multiplying two 10-digit numbers using traditional methods requires 10 × 10 = 10 2 = 100 small multiplications, but only around 10 1.58 ≈ 38 using Karatsuba’s method.