Multiplication of negative numbers 5 out of 4 times 5 out of 4

Multiplication of negative numbers 5 out of 4 times 5 out of 4

25 out of 16

The problem of multiplication of negative numbers
-2 × - 2 = - 4 if this is wrong, please tell me how to calculate it
Or 2 × - 2 = - 4
And please explain why

A negative number is a positive number. A negative number is a positive number multiplied by an even number. An odd number is a negative number

-How to multiply the positive and negative numbers of 99 (17 / 18) * 9?

-99*(17/18)*9
=-99*17*9/18
=-11*17*9/2
=-841.5

What is a positive number multiplied by a negative number?

2×-2=-4