The area of a rectangular tabletop is 1m**2, and the side length of a square tabletop is (9/10)m. How many square meters is the area of the rectangular tabletop larger than the area of the square tabletop?
一个长方形桌面的面积是1m**2，一个正方形桌面的边长是(9/10)m，长方形桌面的面积比正方形桌面的面积多多少平方米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) * (9/10)</gadget>
<output>81/100 = around 0.81</output>

<gadget id="calculator">1 - (81/100)</gadget>
<output>19/100 = around 0.19</output>

<result>19/100 = around 0.19</result>