NEED A CALCULATOR ?

$5 \times 4 \times 3 \times 2 \times 1 \times \underline{\color{#D61F06}{\boldsymbol{0}}} \times -1 \times -2 \times -3 \times -4 \times -5$ $=\huge \boxed{0}$

0*some think = 0.

we have to find the answer of 5 4 3 ......... -3 -4 -5 but in it we have a value =0 and anything multiply by zero is zero so the answer is zero

5 x 4 x 3 x 2 x 1 x 0 x -1 x -2 x -3 x -4 =0

If we write it all out we see that it has a zero in there as well.So the whole expression really is: $5\times4\times3\times2\times1\times0\times(-1)\times(-2)\times(-3)\times(-4)\times(-5)=\boxed{0}$

In full the question is:

5 x 4 x 3 x 2 x 1 x 0 x -1 x - 2 x -3 x -4 x -5

As you can see, there is a x 0 in there, and anything times zero is zero.