Four students planted trees, the first student planted half of the trees planted by other students, the second student planted 1/3 of the trees planted by other students, and the third student planted the trees planted by other students (1/4). The fourth classmate planted 26 trees. How many trees did the four students plant in total?
四名同学种树，第一个同学种的是其他同学种树的一半，第二个同学种的是其他同学种树的(1/3)，第三个同学种的是其他同学种树的(1/4)．第四个同学种了26棵树．四名同学共种了多少棵树．
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/3) - (1/4) - (1/5)</gadget>
<output>13/60 = around 0.216667</output>

<gadget id="calculator">26 / (13/60)</gadget>
<output>120</output>

<result>120</result>