If the length of a rectangle increases (1/3) and the width increases (1/4), how much does its area increase?
一个长方形，长增加(1/3)，宽增加(1/4)，则它的面积增加多少
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>