In North Carolina, Jim bought 10 gallons of gas at $2.00/gallon.  He paid $1.00 more per gallon in Virginia where he bought another 10 gallons of gas.  How much has he spent on gas?
In North Carolina, he bought 10 gallons at $2.00/gallon for a total of 10*2 = $
<gadget id="calculator">10*2</gadget>
<output>20</output>
20.00.
He paid $2.00 a gallon in North Carolina and $1.00 more in Virginia for a total of 2+1 = $
<gadget id="calculator">2+1</gadget>
<output>3</output>
3.00/gallon.
He bought 10 gallons at $3.00/gallon in Virginia for a total of 10*3 = $
<gadget id="calculator">10*3</gadget>
<output>30</output>
30.00.
He spent $20.00 in North Carolina and $30.00 in Virginia for total of 20+30 = $
<gadget id="calculator">20+30</gadget>
<output>50</output>
50.00.

<result>50</result>