In a square field with a length of 1200 meters, 4 hectares of corn are planted, how many hectares of land can be used to grow other crops?
在一块长是1200米的正方形地里，种植了4公顷的玉米，还有多少公顷的地可以用来种植其他作物？
<gadget id="calculator">1_200 / 10_000</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">1_200 * (3/25)</gadget>
<output>144</output>

<gadget id="calculator">144 - 4</gadget>
<output>140</output>

<result>140</result>