To make 1 liter of juice, Sam needs 5 kilograms of oranges. Each kilogram of oranges costs $3. How much money would Sam have to spend to make 4 liters of juice?
To make 4 liters of juice, Sam needs 4 * 5 = 
<gadget id="calculator">4*5</gadget>
<output>20</output>
20 kilograms of oranges.
If one kilogram of oranges costs $3, then 20 kilograms would cost 20 * 3 = $
<gadget id="calculator">20*3</gadget>
<output>60</output>
60.

<result>60</result>