+9665 0/0 will give you a MATH ERROR on a calculator but 0 x 0 won't.
0 x 0 = 0
If you want to present 0 x 0 to the calculator on this site, use 0*0.
* can be typed by pressing the '8' button on your keyboard above the 'i' button when holding shift. Or you just find the * symbol on the calculator.
