198 equals how many kilogram?

Answer 1

-- The question does not specify whether the '198' is ounces, pounds, stone, grams,

or perhaps gallons of some substance.

-- The question also doesn't specify whether the comparison is to be made on Earth,

on the moon, or somewhere else.

Assigning a value to each of these unspecified ambiguities would yield a different answer

to the question.

Answer 2

198 pounds is equivalent to approximately 89.81 kilograms.