Eden, Mary and Iris gather sand to fill their sandbox. Eden carried 4 buckets of sand. Mary carried 3 more buckets of sand than Eden. Iris carried 1 less bucket of sand than Mary. If each bucket contains 2 pounds of sand, how many pounds of sand did they collect in total?
Mary carried 4 + 3 = 
<gadget id="calculator">4+3</gadget>
<output>7</output>
7 buckets of sand.
Iris carried 7 - 1 = 
<gadget id="calculator">7-1</gadget>
<output>6</output>
6 buckets of sand.
All together, they carried 4 + 7 + 6 = 
<gadget id="calculator">4+7+6</gadget>
<output>17</output>
17 buckets of sand.
The sand weighed a total of 17 * 2 = 
<gadget id="calculator">17*2</gadget>
<output>34</output>
34 pounds.

<result>34</result>