Solve 10*9*8*7*6*5*4*3*2*1=

$$10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1=$$

Evaluate

$$3628800$$

Solution Steps

Multiply 10 and 9 to get 90.

$$90\times 8\times 7\times 6\times 5\times 4\times 3\times 2\times 1$$

Multiply 90 and 8 to get 720.

$$720\times 7\times 6\times 5\times 4\times 3\times 2\times 1$$

Multiply 720 and 7 to get 5040.

$$5040\times 6\times 5\times 4\times 3\times 2\times 1$$

Multiply 5040 and 6 to get 30240.

$$30240\times 5\times 4\times 3\times 2\times 1$$

Multiply 30240 and 5 to get 151200.

$$151200\times 4\times 3\times 2\times 1$$

Multiply 151200 and 4 to get 604800.

$$604800\times 3\times 2\times 1$$

Multiply 604800 and 3 to get 1814400.

$$1814400\times 2\times 1$$

Multiply 1814400 and 2 to get 3628800.

$$3628800\times 1$$

Multiply 3628800 and 1 to get 3628800.

$$3628800$$

Factor

$$2^{8}\times 3^{4}\times 5^{2}\times 7$$