John is an eccentric millionaire.  He decides to fill his swimming pool with bottled water.  A cubic foot of water is 25 liters.  His pool is 10 feet deep and 6 feet by 20 feet.  A liter of water costs $3.  How much does it cost to fill the pool?
The pool is 10*6*20=
<gadget id="calculator">10*6*20</gadget>
<output>1_200</output>
1200 cubic feet.
That means it is 25*1200=
<gadget id="calculator">25*1200</gadget>
<output>30_000</output>
30000 liters.
So it cost 3*30,000=$
<gadget id="calculator">3*30000</gadget>
<output>90_000</output>
90,000.

<result>90_000</result>