A pastry chef is making brownies but is running out of butter.  The recipe he is following calls for 2 ounces of butter for every 1 cup of baking mix; however, it allows 2 ounces of coconut oil to be substituted for the 2 ounces of butter if necessary.  The chef would like to use as much butter as possible before switching over and substituting coconut oil.  If the chef had 4 ounces of butter remaining, and he plans on using 6 cups of baking mix, how many ounces of coconut oil will he end up using?
Every 2 ounces of butter is enough to cover 1 cup of baking mix, so the chef's remaining 4 ounces of butter will be enough to cover 4/2 = 
<gadget id="calculator">4/2</gadget>
<output>2</output>
2 cups of baking mix.
This leaves 6 - 2 = 
<gadget id="calculator">6-2</gadget>
<output>4</output>
4 cups of baking mix that will require the use of coconut oil as a substitute.
Since each cup of baking mix requires 2 ounces of coconut oil, these 4 cups will require a total of 4*2 = 
<gadget id="calculator">4*2</gadget>
<output>8</output>
8 ounces of coconut oil.

<result>8</result>