If both the base and the height of a triangle are increased by 10%, how much will the area of the new triangle increase compared to the original one?
一个三角形的底边与高的长度都增加10%，那么新三角形的面积比原来增加多少．
<gadget id="calculator">21 / 100</gadget>
<output>21/100 = around 0.21</output>

<result>21/100 = around 0.21</result>