Candy throws 4 pebbles into the lake.  Lance throws in 3 times as many pebbles as Candy. How many more pebbles did Lance throw compared to Candy?
Lance throws this many pebbles into the lake 4 x 3 = 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12.
He throws this many more pebbles than Candy 12 - 4 = 
<gadget id="calculator">12-4</gadget>
<output>8</output>
8 pebbles.

<result>8</result>