A rectangular table is 2 meters long and 9 decimeters wide. If a piece of glass with the same size as the table top is to be laid on the table, what is the area of the glass?
一张长方形桌子长2米，宽9分米，要在桌面上铺一块与桌面同样大的玻璃，玻璃的面积是多大？
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 * 9</gadget>
<output>180</output>

<result>180</result>