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

The current time is September 2nd 2014, 09:13:26

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

liter
is the second parameter of
7.2 liters

I know from locally stored knowledge that:

Fact 1:
1
is the multiplier that converts
liter and liter
([fact: ["684486520@trueknowledge.com"]])

Fact 1
is true for
all time
([fact: ["1050414414@trueknowledge.com"]])

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

Fact 1
is true at
September 2nd 2014, 09:13:26

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

7.2
is the first parameter of
7.2 liters

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

7.2
is the product of
1 and 7.2

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

volume
is the class of the parametered object
7.2 liters

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

7.2 liters
is the parametered object corresponding to
volume and 7.2 and liter

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

Fact 2:
7.2 liters
is equivalent to
7.2 liters

Fact 2
is true at
September 2nd 2014, 09:13:26

Fact 2:
liter
is the unit used in
7.2 liters