It is known that 15 meters of cloth can be used to make 5 sets of school uniforms. According to this calculation, how many sets of 27 meters of cloth can be made.
已知15米布可以做5套校服，照这样计算，27米布可以做多少套．
<gadget id="calculator">15 / 5</gadget>
<output>3</output>

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

<result>9</result>