Mary is chopping up some old furniture to make firewood. Chairs make 6 sticks of wood, tables make 9 sticks of wood, and stools make 2 sticks of wood. Mary needs to burn 5 sticks of wood per hour to stay warm. If Mary chops up 18 chairs, 6 tables and 4 stools, how many hours can she keep warm?
First find the total sticks from the chairs: 6 sticks/chair * 18 chairs = 
<gadget id="calculator">6*18</gadget>
<output>108</output>
108 sticks.
Then find the total sticks from the tables: 9 sticks/table * 6 tables = 
<gadget id="calculator">9*6</gadget>
<output>54</output>
54 sticks.
Then find the total sticks from the stools: 2 sticks/table * 4 stools = 
<gadget id="calculator">2*4</gadget>
<output>8</output>
8 sticks.
Then add up the total number of sticks she gets: 108 sticks + 54 sticks + 8 sticks = 
<gadget id="calculator">108+54+8</gadget>
<output>170</output>
170 sticks.
Then divide the total number of sticks by the number of sticks she burns per hour to find the total number of hours she can keep warm: 170 sticks / 5 sticks/hour = 
<gadget id="calculator">170/5</gadget>
<output>34</output>
34 hours.

<result>34</result>