The length of a rectangle is 90 cm and the width is 7 decimeters. If it is cut into the largest square, how many square meters is the area reduced?
一个长方形的长是90厘米，宽是7分米．如果将它切割成一个最大的正方形，面积减少了多少平方米？
<gadget id="calculator">63 - 49</gadget>
<output>14</output>

<gadget id="calculator">14 / 100</gadget>
<output>7/50 = around 0.14</output>

<result>7/50 = around 0.14</result>