There are 90 desktop computers in the school, more than laptop computers (4/5). How many laptop computers are there?
学校有台式电脑90台，比笔记本电脑多(4/5)，笔记本电脑有多少台？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">90 / (9/5)</gadget>
<output>50</output>

<result>50</result>