The school shipped 200 saplings, and after the teacher planted 10%, the rest was allocated to the fifth and sixth grades at a ratio of 5:4. How many saplings will the sixth grade get?
学校运来200棵树苗，老师栽了10%后，余下的按5：4分配给五、六两个年级栽，六年级分到多少棵？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">200 * (9/10) * (4/9)</gadget>
<output>80</output>

<result>80</result>