The students planted a total of 120 trees on campus, the number of trees planted by the sixth grade students accounted for the total (2/5), the trees planted by the fifth grade students belonged to the sixth grade students (7/8), how many trees were planted by the fifth grade students?
同学们在校园共植树120棵，六年级同学植树占总数的(2/5)，五年级同学植的树是六年级同学的(7/8)，五年级同学植树多少棵？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">120 * (2/5) * (7/8)</gadget>
<output>42</output>

<result>42</result>