In IEEE arithmetic, division of 0/0 or ∞/∞ results in NaN, but otherwise division always produces a well-defined result. Dividing any non-zero number by positive zero (+0) results in an infinity of the same sign as the dividend. Dividing any non-zero number by negative zero (−0) results in an infinity of the opposite sign as the dividend. This definition preserves the sign of the result in case of arithmetic underflow.
It’s an error, since no amounts of zeros, even infinite, would make it equal 10.
https://en.wikipedia.org/wiki/Division_by_zero#Floating-point_arithmetic