square is extended by 1/3 on one side and 1/4 on the other side to obtain a rectangle. How much does the area of the rectangle increase compared to the square?
一个正方形，一边延长1/3，另一边延长1/4，得到一个长方形，这个长方形比正方形面积增加了多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(4/3) * (5/4)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">1 * 1</gadget>
<output>1</output>

<gadget id="calculator">(5/3) - 1</gadget>
<output>2/3 = around 0.666667</output>

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