By calculation (generator: ["now@trueknowledge.com"]) I know that:

The current time is August 20th 2014, 20:26:53

By calculation (generator: ["second_parameter@trueknowledge.com"]) I know that:

square meter
is the second parameter of
47.42 square meters

I know from locally stored knowledge that:

Fact 1:
10.763910417
is the multiplier that converts
square meter and square foot
([fact: ["644332680@trueknowledge.com"]])

Fact 1
is true for
October 26th 2009, 15:09:56 onwards
([fact: ["644332700@trueknowledge.com"]])

By calculation (generator: ["timeperiodtopoint@trueknowledge.com"]) I know that:

Fact 1
is true at
August 20th 2014, 20:26:53

By calculation (generator: ["first_parameter@trueknowledge.com"]) I know that:

47.42
is the first parameter of
47.42 square meters

By calculation (generator: ["product@trueknowledge.com"]) I know that:

510.42463197414
is the product of
10.763910417 and 47.42

By calculation (generator: ["class_parametered_object@trueknowledge.com"]) I know that:

area
is the class of the parametered object
47.42 square meters

By calculation (generator: ["parametered_object_corresponding_to@trueknowledge.com"]) I know that:

510.42463197414 square feet
is the parametered object corresponding to
area and 510.42463197414 and square foot

By calculation (generator: ["equivalent_to6@trueknowledge.com"]) I know that:

Fact 2:
510.42463197414 square feet
is equivalent to
47.42 square meters

Fact 2
is true at
August 20th 2014, 20:26:53

Fact 2:
square foot
is the unit used in
510.42463197414 square feet