The gear ratio of two circular gears meshing with each other is 2:3, the small gear has 24 teeth, and how many teeth does the large gear have.
两个互相咬合的圆形齿轮的齿数比是2：3，其中小齿轮有24个齿，大齿轮有多少个齿．
<gadget id="calculator">3 * 24</gadget>
<output>72</output>

<gadget id="calculator">72 / 2</gadget>
<output>36</output>

<result>36</result>