The school divides the tree planting task between the sixth grade and the fifth grade according to the ratio of 4:3. In the fifth grade, 60 trees were actually planted, which was 20% less than the total number of assigned tasks. How many trees did you plan to plant in sixth grade?
学校把植树任务按4：3分给六年级和五年级．五年级实际栽了60棵，比原分配任务的总数少栽了20%．原计划六年级栽多少棵树？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">60 / (4/5)</gadget>
<output>75</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">75 * (4/3)</gadget>
<output>100</output>

<result>100</result>