299792458 x 20 = 5995849160
400 multiplied by 20 is 8,000
20 multiplied by 2,000 is 40,000
2,000 multiplied by 20 is 40,000.
They can be multiplied by anything.
1000
88,400,000,000
20 x 20 = 400
4 multiplied by 5 is 20.
20
20 multiplied by 20 is 400.
An even multiple of 20 is equal to 20 multiplied by an even number, that is 20 multiplied by 2k where k is any integer.
The two numbers that can be multiplied to get 20 and added to get -9 are -4 and -5. When multiplied, (-4 \times -5 = 20), and when added, (-4 + -5 = -9).