If the base of a triangle is increased by 10%, and the height is decreased by 10%, what percentage is the area decreased?
一个三角形底增加10%，高减少10%，面积减少百分之几？
<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<result>1/100 = around 0.01</result>