Mark is making a quadruple batch of brownies. The normal recipe calls for 3 cups of flour and 1 cup milk. If flour is sold in 2-cup bags and milk is sold in 2-cup bottles, how many more bags of flour than bottles of milk does Mark have to buy?
To make 4 brownies, Mark needs: 3 cups * 4 = 
<gadget id="calculator">3*4</gadget>
<output>12</output>
12 cups of flour.
To get 12 cups of flour, Mark needs to buy: 12 cups / 2 cups per bag = 
<gadget id="calculator">12/2</gadget>
<output>6</output>
6 bags.
To make 4 brownies, Mark needs: 1 cup * 4 = 
<gadget id="calculator">1*4</gadget>
<output>4</output>
4 cups of milk.
To get 4 cups of milk, Mark needs to buy: 4 cups / 2 cups/bottle = 
<gadget id="calculator">4/2</gadget>
<output>2</output>
2 bottles of milk.
Finally, subtract the number of bottles of milk from the number of bags of flour to find the difference: 6 - 2 = 
<gadget id="calculator">6-2</gadget>
<output>4</output>
4.

<result>4</result>