The computer classroom in our school is 9.9 meters long and 7.8 meters wide. How many square meters is this classroom?
我们学校的计算机教室长9.9米，宽7.8米，这间教室的面积是多少平方米？
<gadget id="calculator">9.9 * 7.8</gadget>
<output>77.22</output>

<result>77.22</result>