Fuchun Park covers an area of 120 hectares, of which the ratio of water surface area to land area is about 1:5. The water surface area of Fuchun Park is how many hectares less than the land area.
富春公园占地120公顷，其中水面面积和陆地面积的比大约是1：5．富春公园的水面面积比陆地面积少多少公顷．
<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">120 * (5/6)</gadget>
<output>100</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">120 * (1/6)</gadget>
<output>20</output>

<gadget id="calculator">100 - 20</gadget>
<output>80</output>

<result>80</result>