There are 9 tricycles and four-wheel vehicles with 32 wheels, how many of them are four-wheeled vehicles?
三轮车和四轮车共9辆，有32个轮子，其中四轮有多少辆．
<gadget id="calculator">3 * 9</gadget>
<output>27</output>

<gadget id="calculator">32 - 27</gadget>
<output>5</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<result>5</result>