4.83 is 2.67 less than 2.5 times of a number, find this number.
4.83比一个数的2.5倍少2.67，求这个数．
<gadget id="calculator">4.83 + 2.67</gadget>
<output>7.5</output>

<gadget id="calculator">7.5 / 2.5</gadget>
<output>3</output>

<result>3</result>