Uncle Wang’s family built a new house, and originally planned to open a window with a length of 1 meter and a height of 7.5 decimeters on the north wall. Later, he thought it was too small, so he increased the length and width by 2 decimeters. How many square meters is the area of the window now than it was before?
王大爷家新盖了一间房子，原打算在北墙上开一个长1米、高7.5分米的窗户．后来他嫌小了，又把长和宽都增加了2分米．现在窗户的面积比原来增加了多少平方米．
<gadget id="calculator">1 * 10</gadget>
<output>10</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">7.5 + 2</gadget>
<output>9.5</output>

<gadget id="calculator">12 * 9.5</gadget>
<output>114</output>

<gadget id="calculator">1 * 10 * 7.5</gadget>
<output>75</output>

<gadget id="calculator">114 - 75</gadget>
<output>39</output>

<gadget id="calculator">39 / 100</gadget>
<output>39/100 = around 0.39</output>

<result>39/100 = around 0.39</result>