The school has to paint the walls and ceiling of a classroom. It is known that the length of the classroom is 10 meters, the width is 8 meters, and the height is 3.5 meters. The area after deducting the doors and windows is 15.5 square meters. How many square meters is the area to be painted?
学校要粉刷一间教室的四壁和天花板．已知教室的长是10米，宽8米，高3.5米，扣除门窗的面积15.5平方米，要粉刷的面积是多少平方米？
<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<gadget id="calculator">10 * 3.5 * 2</gadget>
<output>70</output>

<gadget id="calculator">8 * 3.5 * 2</gadget>
<output>56</output>

<gadget id="calculator">56 - 15.5</gadget>
<output>40.5</output>

<gadget id="calculator">80 + 70 + 40.5</gadget>
<output>190.5</output>

<result>190.5</result>