Two gears meshing with each other, the gear ratio is 4:3, if the large gear has 124 teeth, how many teeth does the small gear have?
两个相互咬合的齿轮，齿轮齿数比是4：3，如果大齿轮有124个齿，那么小齿轮有多少个齿．
<gadget id="calculator">124 / 4</gadget>
<output>31</output>

<gadget id="calculator">31 * 3</gadget>
<output>93</output>

<result>93</result>