The four students planted a total of 120 trees. The first student planted 1/3 of the total number of trees planted by other students, the second student planted 1/4 of the total number of trees planted by other students, and the second student planted 1/4 of the total number of trees planted by other students. The trees planted by the three students are (1/5) of the total number of trees planted by other students. How many trees did the fourth student plant?
四位同学共种树120棵，第一位同学种的树是其它同学种树总数的(1/3)，第二位同学种的树是其它同学种树总数的(1/4)，第三位同学种的树是其它同学种树总数的(1/5)．第四位同学种了多少棵树？
<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 + 5</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/4) - (1/5) - (1/6)</gadget>
<output>23/60 = around 0.383333</output>

<gadget id="calculator">120 * (23/60)</gadget>
<output>46</output>

<result>46</result>