Tammy has 10 orange trees from which she can pick 12 oranges each day. Tammy sells 6-packs of oranges for $2. How much money will Tammy have earned after 3 weeks if she sells all her oranges?
Tammy picks 10 trees x 12 oranges/tree = 
<gadget id="calculator">10*12</gadget>
<output>120</output>
120 oranges per day.
Tammy sells 120 oranges/day / 6 oranges/pack = 
<gadget id="calculator">120/6</gadget>
<output>20</output>
20 6-packs of oranges a day.
Tammy sells 20 packs/day x 7 days/week = 
<gadget id="calculator">20*7</gadget>
<output>140</output>
140 6-packs a week.
In 3 weeks Tammy sells 140 packs/week x 3 weeks = 
<gadget id="calculator">140*3</gadget>
<output>420</output>
420 6 -packs.
Tammy makes 420 packs x $2/pack = $
<gadget id="calculator">420*2</gadget>
<output>840</output>
840.

<result>840</result>