There are four growing trees. The first tree grows 1 meter/day, the second grows the same amount in half the time, the third grows 2 meters/day, and the fourth tree grows a meter more than the third each day. How many meters did the trees grow in total in 4 days?
The second tree grows 1*2 = 
<gadget id="calculator">1*2</gadget>
<output>2</output>
2 meters a day.
The fourth tree grows 2+1 = 
<gadget id="calculator">2+1</gadget>
<output>3</output>
3 meters a day.
The first tree grows 4*1 = 
<gadget id="calculator">4*1</gadget>
<output>4</output>
4 meters in 4 days.
The second tree grows 2*4 = 
<gadget id="calculator">2*4</gadget>
<output>8</output>
8 meters in 4 days.
The third tree grows 2*4 = 
<gadget id="calculator">2*4</gadget>
<output>8</output>
8 meters in 4 days.
The fourth tree grows 3*4 = 
<gadget id="calculator">3*4</gadget>
<output>12</output>
12 meters in 4 days.
In 4 days, all four trees grew 4+8+8+12 = 
<gadget id="calculator">4+8+8+12</gadget>
<output>32</output>
32 meters combined.

<result>32</result>