The Factorial of Hundred is equal to **9.332622e+157**.

**Following is the step-by-step explanation –**

To understand how to calculate the factorial of hundred (100!), we need to understand how to calculate factorial of any number.

For example, Factorial of 5 is calculated in following way –

**5! = 5 x (5-1) x (5-2) x (5-3) x (5-4) = 5 x 4 x 3 x 2 x 1 = 120**

The idea is to keep subtracting 1 digit from 5 in ascending order.

So, if we calculate the factorial of 100 (100!) we will have to do the following –

100! = 100 × (100 – 1) × (100 – 2) × (100 – 3) × (100 – 4) … x (100-99)

**= 100 × 99 × 98 × 97 × 96 … x 1**

So, the complete answer for the Factorial of 100 is –

100! = 933262154439441526816992388562667004

907159682643816214685929638952175

999932299156089414639761565182862536979

20827223758251185210916864

000000000000000000000000.