Libby is building an igloo in her backyard using bricks of snow. She builds her igloo in rows, using a total of 10 rows of bricks of snow. The bottom half of the igloo has 12 bricks of snow in each row while the top half of the igloo has 8 bricks of snow in each row. How many bricks of snow did Libby use for her igloo?
In the bottom half of the igloo, there are 10 rows / 2 = 
<gadget id="calculator">10/2</gadget>
<output>5</output>
5 rows of bricks of snow.
So in the bottom half of the igloo, there are 5 rows * 12 bricks of snow in each row = 
<gadget id="calculator">5*12</gadget>
<output>60</output>
60 bricks of snow.
In the top half of the igloo, there are 5 rows * 8 bricks of snow in each row = 
<gadget id="calculator">5*8</gadget>
<output>40</output>
40 bricks of snow.
There is therefore a total of 60 + 40 = 
<gadget id="calculator">60+40</gadget>
<output>100</output>
100 bricks of snow in the igloo.

<result>100</result>