The value of/[/left (1-{1/over3} / right) / left (1-{1/over4} / right) / left (1-{1/over5} / right) ... / left (1-{1/over n} / right) / ]is equal to?

Example 1

verbose explicit high3 plus 4 cross 2 minus minus 2 equals 3 plus 8 plus 2 equals 1 3 verbose explicit high semantics3 plus 4 times 2 minus negative 2 equals 3 plus 8 plus 2 equals 13 verbose explicit high semantics high3 plus 4 times 2 minus negative 2 equals 3 plus 8 plus 2 equals 13

For most fractions, the beginning is indicated with "start fraction", the horizontal line is indicated with "over", and the end of the fraction is indicated by "end fraction". For the semantic interpretation, most numeric fractions are spoken as they are in natural speech. Also if a number is followed by a numeric fraction, the word "and" is spoken in between.