The number of trees planted in the fifth and sixth grades is 120 more than 60% of the total number of trees in the sixth grade, and the number of trees planted in the fifth grade is 3/5 of the sixth grade. How many saplings are there in total?
五、六两个年级去植树，六年级植树的棵数比总棵数的60%多120棵，五年级植树的棵数是六年级的(3/5)，这批树苗一共有多少棵？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(5/8) - (3/5)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">120 / (1/40)</gadget>
<output>4_800</output>

<result>4_800</result>