(1/7) of the area of the large square is equal to (1/3) of the area of the small square, what is the area of the large square equal to the area of the small square
大正方形面积的(1/7)和小正方形面积的(1/3)相等，大正方形的面积是小正方形面积的多少
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / (1/3)</gadget>
<output>3</output>

<gadget id="calculator">1 / (1/7) / 3</gadget>
<output>7/3 = around 2.333333</output>

<result>7/3 = around 2.333333</result>