Perhaps you are referring to the vara, which was a surveying unit of length, originating from Spain. It is approximately 1 yard. Many surveys in Texas were specified in vara, which was 33 1/3 inches. Note that the var or vara is a unit of length, while acre is a unit of area. So square vars could convert to acres. See related link, below.
The question is a bit unclear, but if you are asking how many "var" are in 1 meter, it depends on the context of the term "var." In the Indian system of measurement, 1 var is equal to approximately 0.9144 meters. So, in this context, there would be about 1.0936 vars in 1 meter. However, if you are referring to a different system or definition of "var," the conversion would vary.
1 var means how many sq ft?
1 square VAR = 7.7 Square feet
1
1.196 var, approx.
1 acre = 40.5 ares
9
1 acre = 4,046.8564 square meters
There are approximately 6.25 rai in 1 acre.
1 acre = 4,046.86 m2
1 acre = 43,560 square feet.
Answer: 1 acre = 0.004046 km²