(x) represents the integer part of the number x, for example (6.28)=6, if x=9.42, then (x)+(2x)+(3x)=how much.
(x)表示取数x的整数部分，比如(6.28)=6，若x=9.42，则(x)+(2x)+(3x)=多少．
<gadget id="calculator">9 + 18 + 28</gadget>
<output>55</output>

<result>55</result>