Basic Math Examples

$\frac{8!}{4! \cdot 4!}$

Step 1

Rewrite

$8!$ as

$8 \cdot 7 \cdot 6 \cdot 5 \cdot 4!$ .

$\frac{8 \cdot 7 \cdot 6 \cdot 5 \cdot 4!}{4! \cdot 4!}$

Step 2

Cancel the common factor of

$4!$ .

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Step 2.1

Cancel the common factor.

$\frac{8 \cdot 7 \cdot 6 \cdot 5 \cdot 4!}{4! \cdot 4!}$

Step 2.2

Rewrite the expression.

$\frac{8 \cdot 7 \cdot 6 \cdot 5}{4!}$

Step 3

Simplify the numerator.

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Step 3.1

Multiply

$8$ by

$7$ .

$\frac{56 \cdot 6 \cdot 5}{4!}$

Step 3.2

Multiply

$56$ by

$6$ .

$\frac{336 \cdot 5}{4!}$

Step 3.3

Multiply

$336$ by

$5$ .

$\frac{1680}{4!}$

Step 4

Simplify the denominator.

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Step 4.1

Expand

$4!$ to

$4 \cdot 3 \cdot 2 \cdot 1$ .

$\frac{1680}{4 \cdot 3 \cdot 2 \cdot 1}$

Step 4.2

Multiply

$4 \cdot 3 \cdot 2 \cdot 1$ .

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Step 4.2.1

Multiply

$4$ by

$3$ .

$\frac{1680}{12 \cdot 2 \cdot 1}$

Step 4.2.2

Multiply

$12$ by

$2$ .

$\frac{1680}{24 \cdot 1}$

Step 4.2.3

Multiply

$24$ by

$1$ .

$\frac{1680}{24}$

Step 5

Divide

$1680$ by

$24$ .

$70$