A forest covers an area of about 50 hectares, and an area of about 1 square kilometer is equivalent to how many such forests.
一个树林的占地面积约为50公顷，占地面积约为1平方千米的地方相当于多少个这样的树林．
<gadget id="calculator">100 / 50</gadget>
<output>2</output>

<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<result>2</result>