The school divides the tree planting task between the sixth grade and the fifth grade according to the ratio of 5:3. The sixth grade completed the task after planting 120 trees. How many trees were planted in the fifth and sixth grades?
学校把植树任务按5：3分给六年级和五年级．六年级栽了120棵就完成了任务．五、六年级共植树多少棵？
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

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

<gadget id="calculator">120 / (5/8)</gadget>
<output>192</output>

<result>192</result>