The mischievous family bought a new house with an area of 83 square meters in a community. After measurement, it is found that the sum of the areas of the two bedrooms is 41.3 square meters, and the total area of the other parts is 19.8 square meters, so what is the shared area of his house?
淘气家在某小区购买了一套面积83平方米的新房．经测量发现，两个卧室的面积和是41.3平方米，其他部分的面积一共是19.8平方米，那么他家住房的公摊面积是多少．
<gadget id="calculator">41.3 + 19.8</gadget>
<output>61.1</output>

<gadget id="calculator">83 - 61.1</gadget>
<output>21.9</output>

<result>21.9</result>