Bert made 12 sandwiches for his trip. On the first day, he ate half of the sandwiches he made. The next day he ate 2 sandwiches less. How many sandwiches does Bert have left after these two days?
On the first day, Bert ate 12 / 2 = 
<gadget id="calculator">12/2</gadget>
<output>6</output>
6 sandwiches.
The second day he ate 6 - 2 = 
<gadget id="calculator">6-2</gadget>
<output>4</output>
4 sandwiches.
So in total Bert is left with 12 - 6 - 4 = 
<gadget id="calculator">12-6-4</gadget>
<output>2</output>
2 sandwiches.

<result>2</result>