The perimeter of a rectangular vegetable field is 968 meters, and the ratio of length to width is 3:1. What is the area of the land in hectares?
一块长方形菜地周长为968米，长与宽的比是3：1．这块地的面积是多少公顷？
<gadget id="calculator">968 / 2</gadget>
<output>484</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(1/4) / 10_000</gadget>
<output>1/40_000 = around 0.000025</output>

<gadget id="calculator">484 * (3/4) * 484 * (1/40_000)</gadget>
<output>43_923/10_000 = around 4.3923</output>

<result>43_923/10_000 = around 4.3923</result>