James has to refuel his plane.  It used to cost $200 to refill the tank.  He got an extra tank to double fuel capacity.  Fuel prices also went up by 20%.  How much does he pay now for fuel?
The cost to fill a tank went up 200*.2=$
<gadget id="calculator">200*.2</gadget>
<output>40</output>
40.
So it cost 200+40=$
<gadget id="calculator">200+40</gadget>
<output>240</output>
240 to fill the tank.
That means he now pays 240*2=$
<gadget id="calculator">240*2</gadget>
<output>480</output>
480.

<result>480</result>