The ratio of the teeth of two circular gears meshing with each other is 4:3, the large gear has 36 teeth, and how many teeth does the small gear have.
两个相互咬合的圆形齿轮的齿数之比是4：3，其中大齿轮有36个齿，小齿轮有多少个齿．
<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>