The answer may surprise you. The answer is that zero times anything is not always zero. I have 2 examples of zero being multiplied by something else and not mathematically resulting in zero.
1) 0 * (1/0) = undefined
2) 0! = 1
You may think the second one doesn’t count but it does. Factorial or the exclamation point means you take the number and multiply it by every number below it all the way down to 1. Zero is different though. 0! is equal to 1.
Also, for fun, you should ask Siri what zero divided by zero is. You’ll get a good laugh.
Best wishes,
Pharmacoengineering.com