The leak in Jerry's roof drips 3 drops a minute into the pot he put under it. Each drop is 20 ml, and the pot holds 3 liters. How long will it take the pot to be full?
First find the pot's volume in ml: 3 liters * 1000 ml/liter = 
<gadget id="calculator">3*1000</gadget>
<output>3_000</output>
3000 ml.
Then find the number of ml that enter the pot per minute: 3 drops/minute * 20 ml/drop = 
<gadget id="calculator">3*20</gadget>
<output>60</output>
60 ml/minute.
Then divide the volume of the pot by the volume that enters it every minute: 3000 ml / 60 ml/minute = 
<gadget id="calculator">3000/60</gadget>
<output>50</output>
50 minutes.

<result>50</result>