John starts climbing a very steep hill.  He travels 1 foot vertically for every two feet horizontally.  His elevation increases from 100 feet to 1450 feet.  How far does he move horizontally, in feet?
He travels 1450-100=
<gadget id="calculator">1450-100</gadget>
<output>1_350</output>
1350 feet vertically.
So he travels 1350*2=
<gadget id="calculator">1350*2</gadget>
<output>2_700</output>
2700 feet horizontally.

<result>2_700</result>