To compute 987,654,321 squared exactly, we need to perform the multiplication:
987,654,321 × 987,654,321.

This is a very large calculation to do by hand, but it can be done using long multiplication or with a computational tool. The exact result is an 18-digit number.

### The Exact Answer

**987,654,321² = 975,461,059,263,526,941**

For readability, the number is:
**975 quadrillion, 461 trillion,
