At the supermarket, the price paid for oranges is proportional to the mass purchased. Annie paid $6 for 2 kg of oranges. How much will Annie pay for 12 kg of oranges?
The price of 1 kg of oranges is $6 / 2 kg = $
<gadget id="calculator">6/2</gadget>
<output>3</output>
3/kg.
So Ali will pay 12 kg * $3/kg = $
<gadget id="calculator">12*3</gadget>
<output>36</output>
36 for 12 kg of oranges.

<result>36</result>