There are 75 yellow balloons and 63 red balloons in the store. The number of flower balloons is 30 less than the total number of yellow balloons and red balloons. How many flower balloons are there?
商店有黄气球75个，红气球63个，花气球的个数比黄气球和红气球的总数少30个，花气球有多少个？
<gadget id="calculator">75 + 63</gadget>
<output>138</output>

<gadget id="calculator">138 - 30</gadget>
<output>108</output>

<result>108</result>